Patent Publication Number: US-11019995-B2

Title: Retinal scanning type eye examination device, retinal scanning type eye examination system, eyewear provision system, and retinal scanning type eyewear

Description:
TECHNICAL FIELD 
     The present invention relates to a retinal scanning type eye examination device, a retinal scanning type eye examination system, a retinal scanning type eye examination method, a retinal scanning type eyewear provision system, a retinal scanning type eyewear provision method, and a retinal scanning type eyewear. 
     BACKGROUND 
     Background Art 
     Traditionally, various types of eye examinations are conducted using an eye examination instrument or an ophthalmoscopic device. In the eye examination, a method of displaying a test image and of letting an examinee to recognize the test image has been known (Patent Document 1). In addition, it has been known that a seller of eyeglasses and the like acquires data required to make a lens or frame of the eyeglasses for each user, and the seller sends this data to a processing factory of the eyeglasses (Patent Document 2). 
     Recently, a retinal scanning type head-mounted display utilizing Maxwellian view has been known. Maxwellian view is a method for causing a person to visually recognize an image represented by image data to a person without being affected by an accommodative function of a lens of the user&#39;s eye by projecting a light beam based on the image data on a retina after the light beam is converged once at the center of a pupil. 
     When manufacturing the retinal scanning type head-mounted display, various user-specific parameters are required depending on a state of a user&#39;s eye. Accordingly, when a retinal scanning type head-mounted display is manufactured and sold, the following procedures are required, for example. First, a retinal scanning type head-mounted display is placed on a user to acquire user parameters. Next, a customizing operation is performed based on the acquired user parameters. 
     CITATION LIST 
     Patent Document 
     [Patent Document 1] Japanese Laid-open Patent Application Publication No. 2002-130495 
     [Patent Document 2] Japanese Laid-open Patent Application Publication No. 2002-162607 
     SUMMARY 
     Problem to be Solved by the Invention 
     Because the above-described procedures for the method of manufacturing and selling the retinal scanning type head-mounted display are complex, an improvement of efficiency is desired. 
     However, in the above-described method of selling eyeglasses, only data on lenses and frames can be acquired, and parameters necessary for projecting an image onto a user&#39;s retina cannot be acquired. Further, in the conventional eye examination technique, if an examinee has a disease in the anterior portion of his/her eye, an eye examination including his/her retina cannot be made. 
     The disclosed technology is developed in light of the above-mentioned circumstances, and is intended to improve manufacturing efficiency of a retinal scanning type head-mounted display. 
     Means for Solving Problem 
     The disclosed technology is a retinal scanning type eye examination device including a storage unit configured to store test image data; a laser emitting unit including a laser light source configured to generate an imaging laser beam based on the test image data, the laser emitting unit being configured to project a test image onto a retina of an eyeball of a person subjected to an eye examination by using the imaging laser beam; an optical component configured to cause the imaging laser beam to converge at an inside of the eyeball of the person; a parameter acquiring unit configured to acquire parameter information for a retinal scanning type eyewear, the parameter information including angle information indicating a rotation angle of the laser emitting unit when the laser emitting unit is rotated around a converging point of the laser beam; and an output unit configured to output the parameter information to an external device. 
     Effect of Invention 
     Efficiency of production of a retinal scanning type head-mounted display is improved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram illustrating an eye examination device according to a first embodiment; 
         FIG. 2  is a diagram illustrating an example of a system configuration of an eyewear provision system according to the first embodiment; 
         FIG. 3  is a diagram illustrating an example of a hardware configuration of an eye examination device; 
         FIG. 4  is a diagram illustrating a configuration of a laser emitting unit; 
         FIG. 5  is a diagram illustrating a configuration of an eyepiece device; 
         FIG. 6  is a diagram illustrating functions of the eye examination device; 
         FIG. 7  is a diagram illustrating an example of a test image according to the first embodiment; 
         FIG. 8  is a diagram illustrating an example of parameter information of the first embodiment; 
         FIG. 9  is a diagram illustrating an example of eye examination result information of the first embodiment; 
         FIG. 10  is a flowchart illustrating a process of the eye examination device according to the first embodiment; 
         FIG. 11  is a diagram illustrating an example of a system configuration of an eyewear provision system according to a second embodiment; 
         FIG. 12  is a diagram illustrating an example of a hardware configuration of a management device; 
         FIG. 13  is a diagram illustrating functions of each device in the eyewear provision system according to the second embodiment; 
         FIG. 14  is a diagram illustrating an example of a user information database according to the second embodiment; 
         FIG. 15  is a diagram illustrating an example of an attribute mapping database according to the second embodiment; 
         FIG. 16  is a diagram illustrating image processing according to the second embodiment; 
         FIG. 17  is a sequence diagram illustrating an operation of the eyewear provision system according to the second embodiment; 
         FIG. 18  is a flowchart illustrating a process of the management device according to the second embodiment; 
         FIG. 19  is a flowchart illustrating a process of a terminal device according to the second embodiment; 
         FIG. 20  is a diagram illustrating an example of a system configuration of an eyewear provision system according to a third embodiment; 
         FIG. 21  is a diagram illustrating a structure of a retinal scanning type eyewear; 
         FIG. 22A  illustrates an eyewear prior to application of a pupil-to-pupil distance; and 
         FIG. 22B  illustrates an eyewear after application of the pupil-to-pupil distance. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     First Embodiment 
     Hereinafter, a first embodiment will be described with reference to the drawings.  FIG. 1  is a diagram illustrating an eye examination device according to a first embodiment. 
     The eye examination device  10  of the present embodiment is a retinal scanning type eye examination device. Specifically, the eye examination device  10  according to the present embodiment retains image data for examination (test image data), and by irradiating a retina of a person P subjected to an eye examination (examinee P or subject P) with a laser beam based on the test image data, an image for examination (test image) is projected onto the retina of the subject P. Next, the eye examination device  10  receives, from the subject P, an input of, for example, an operation to adjust a position of a laser emitting unit of the eye examination device  10 , information indicating a method of viewing the test image, and the like. 
     Based on the input information, the eye examination device  10  generates and outputs parameter information for projecting an image on the retina of the subject P. In addition, the eye examination device  10  according to the present embodiment may generate eye examination result information of the eye of the subject P based on the input information, and retain or output the test result information. 
     The parameter information of the subject P is information that includes, for example, a pupil-to-pupil distance of the subject P, a visual field of the subject P, a distance from the laser emitting unit to the focal point of the subject P, the angle of the laser beam emitted from a laser light source, and the like. In other words, the parameter information of the present embodiment is information indicating a region scanned by the laser beam in the retina of the subject P. Further, the eye examination result information is information indicating a result of an eye examination of the subject P, which is, in other words, information indicating a status of the eyeball of the test subject P. Details of the parameter information and the eye examination result information will be described below. 
     The eye examination device  10  according to the present embodiment is mounted on a pedestal  20  or the like, and an eye examination is performed with the eyes brought close to an eyepiece device of the eye examination device  10  such that the subject P is looking inside the eyepiece device. The example of  FIG. 1  illustrates a case in which an eye examination is conducted while the subject P is sitting on a chair, but a mode of an eye examination is not limited to the case illustrated in  FIG. 1 . The subject P may conduct the eye examination while he/she is standing. 
     The eye examination device  10  according to the present embodiment may be installed, for example, in a store where a retinal scanning type head-mounted display (hereinafter referred to as an eyewear) is sold, or in a hospital (ophthalmological clinic, etc.). Also, the eye examination device  10  according to the present embodiment may be installed in a gymnasium, a sports gym, a commercial facility, or the like. The eye examination device  10  according to the present embodiment may be installed at any location as long as the subject P can conduct an eye examination. 
     Next, a retinal scanning type eyewear provision system using the eye examination device  10  according to the present embodiment will be described with reference to  FIG. 2 . In the following description, the retinal scanning type eyewear provision system is simply referred to as an eyewear provision system.  FIG. 2  is a diagram illustrating an example of a system configuration of the eyewear provision system according to the first embodiment. 
     The eyewear provision system  100  according to the present embodiment includes the eye examination device  10  and a terminal device  30 . The eye examination device  10  communicates with the terminal device  30  via a network or the like. 
     In the eyewear provision system  100  according to the present embodiment, when the eye examination device  10  acquires parameter information  40  of the subject P, the eye examination device  10  transmits the acquired parameter information  40  to the terminal device  30 . 
     The terminal device  30  according to the present embodiment may be, for example, a terminal device for controlling a manufacturing device for manufacturing an eyewear  50 . The eyewear  50  is a retinal scanning type head-mounted display. In this case, the terminal device  30  may read out the parameter information  40  during manufacturing process of the eyewear  50 , and may cause the manufacturing device of the eyewear  50  to mount or set various parts on the eyewear  50  based on the parameter information  40 . 
     The terminal device  30  according to the present embodiment may be, for example, a terminal device disposed in a shop selling the eyewear  50  which is used for storing and managing the parameter information  40  together with customer information. In this case, for example, when receiving an order for an eyewear  50 , the terminal device  30  may pass the parameter information  40  of a user of the eyewear  50  to a manufacturing factory of the eyewear  50  or the like. 
     As described above, in the present embodiment, by only performing an eye examination of users, the parameter information necessary for customizing the eyewear  50  for each of the users can be obtained, and the obtained parameter information can be used for manufacturing the eyewear  50 . Therefore, according to the present embodiment, manufacturing efficiency of the eyewear  50  can be improved. 
     Further, for example, the terminal device  30  according to the present embodiment may be a terminal device owned by the subject P who conducts an eye examination. Further, the terminal device  30  of the present embodiment may be a control device connected to the eyewear  50 . As described here, if the user&#39;s parameter information  40  is stored in the terminal device or the eyewear  50  owned by the user, this parameter information can be used, for example, in a case of replacement or repair of the eyewear  50 . 
     Next, an eye examination device  10  according to the present embodiment will be described with reference to  FIG. 3 .  FIG. 3  is a diagram illustrating an example of a hardware configuration of an eye examination device. 
     The eye examination device  10  according to the present embodiment includes an input device  11 , an output device  12 , an arithmetic processing device  13 , a storage device  14 , a mechanism controller  15 , an eyepiece device  16 , and an operation device  17 . 
     The input device  11  receives various types of information with respect to the eye examination device  10 . The input device  11  also includes, for example, an operating device or a keyboard that provides instructions to the eye examination device  10 , and a receiving device that receives information transmitted to the eye examination device  10 . 
     The output device  12  outputs various types of information from the eye examination device  10 . The output device  12  also includes, for example, a transmission device that transmits information acquired by the eye examination device  10  to an external device, and a display that displays results of various processes performed by the eye examination device  10 . 
     The arithmetic processing device  13  is implemented by a CPU (Central Processing Unit) or the like that controls an entirety of the eye examination device  10 . The storage device  14  stores various programs executed in the arithmetic processing device  13 , test image data, and the like. In addition, the storage device  14  retains the parameter information acquired as a result of the eye examination, the eye examination result information, and the like. 
     The mechanism controller  15  controls operations of various mechanisms in the eyepiece device  16  of the eye examination device  10 , in response to manipulation of an operation device  17 . The mechanism controller  15  also outputs the test image data read out from the storage device  14  by the arithmetic processing device  13  to the eyepiece device  16 . 
     The eyepiece device  16  includes a laser emitting unit  60 , and includes a mechanism for moving the laser emitting unit  60  to emit a laser beam emitted from the laser emitting unit  60  to a desired location of the subject. The laser emitting unit  60  emits laser light to project an image for examination (test image) onto a retina of the subject P, based on the image data for examination (test image data) input from the mechanism controller  15 . Details of the eyepiece device  16  and the laser emitting unit  60  will be described below. The operation device  17  is manipulated to adjust a position of the laser emitting unit  60  in the eyepiece device  16 . 
     Next, a configuration of the laser emitting unit  60  according to the present embodiment will be described with reference to  FIG. 4 .  FIG. 4  is a diagram illustrating a configuration of the laser emitting unit. 
     The laser emitting unit  60  according to the present embodiment includes a laser light source  62 , a MEMS (Micro Electro Mechanical Systems) mirror  63 , a mirror  64 , a tablet lens  65 , a mirror  66 , a mirror  67 , and a condenser  68 . 
     The laser light source  62  emits a laser beam L, based on the test image data, so that the test image is projected onto a retina of an eyeball E. The MEMS mirror  63  scans the laser beam L vertically and horizontally by control based on the test image data. 
     The laser beam L scanned by the MEMS mirror  63  is reflected by the mirror  64  and enters the tablet lens  65 . A direction of the laser beam L passing through the tablet lens  65  is changed to a desired direction by the mirrors  66  and  67 , and is entered into the condenser  68 . That is, in the present embodiment, the laser beam L is condensed by the tablet lens  65  and the condenser  68 , and is emitted from the laser emitting unit  60  toward the eyeball E of the subject P. At this time, the laser beam L is condensed to converge at a laser focal point F, which is the substantially central portion of a lens of the eyeball E. A distance from a surface of the condenser  68  on a side facing the eyeball E to the laser focal point F is usually set at approximately 5 mm to 7 mm. 
       FIG. 4  is an example of, but not limited to, an optical system of the laser emitting unit  60 . The number and arrangement of mirrors and condensers may vary depending on configurations of the eyepiece device  16 . 
     Next, an eyepiece device  16  according to the present embodiment will be described with reference to  FIG. 5 .  FIG. 5  is a diagram illustrating a configuration of the eyepiece device.  FIG. 5  (A) illustrates a perspective view of a right portion of the eyepiece device  16  divided at the center.  FIG. 5  (B) illustrates a front view of  FIG. 5  (A) when viewed from a direction of arrow A.  FIG. 5  (C) illustrates a bottom view of  FIG. 5  (A). A left portion of the eyepiece device  16  according to the present embodiment has the same configuration as that obtained by laterally inverting the configuration of the right portion. 
     The eyepiece device  16  according to the present embodiment includes the laser emitting unit  60 , a base  70 , an X-axis drive motor  71 , a Y-axis drive motor  72 , a Z-axis drive motor  73 , an X-axis rotation motor  74 , and a Y-axis rotation motor  75 . 
     The laser emitting unit  60  is supported by the base  70  so as to be moved (translated) in the X-axis direction, the Y-axis direction, and the Z-axis direction illustrated in the drawing by the X-axis drive motor  71 , the Y-axis drive motor  72 , and the Z-axis drive motor  73  respectively. The laser emitting unit  60  is also supported by the base  70  so as to be rotated around the X-axis and the Y-axis illustrated in the drawing by the X-axis rotation motor  74  and the Y-axis rotation motor  75  respectively. 
     For example, when the X-axis drive motor  71 , the Y-axis drive motor  72 , and the Z-axis drive motor  73  are driven in response to manipulation of the operation device  17 , the laser emitting unit  60  is moved in an X-axis direction, a Y-axis direction, and a Z-axis direction respectively. In addition, in response to manipulation of the operation device  17 , the X-axis rotation motor  74  and the Y-axis rotation motor  75  are driven, and the laser emitting unit  60  rotates about the X-axis and the Y-axis respectively. The focal point F exists on a rotational axis in the X-axis direction (may be referred to as an X-rotational axis) and on a rotational axis in the Y-axis direction (may be referred to as a Y-rotational axis). That is, the laser focal point F exists at an intersection of the X-rotational axis and the Y-rotation axis, and the X-rotational axis and the Y-rotational axis rotate about the focal point F. 
     In the present embodiment, for example, a moving distance in the X-axis direction from an initial state, a moving distance in the Y-axis direction from the initial state, a moving distance in the Z-axis direction from the initial state, a rotation angle around the X-axis from the initial state, a rotation angle around the Y-axis from the initial state, and the like may be acquired as the parameter information. 
     That is, in the present embodiment, the rotation angles around the X-axis and the Y-axis with respect to the laser focal point F are parameter information. 
     The moving distance in the X-axis direction is used to calculate the pupil-to-pupil distance. Specifically, the sum of the moving distance in the X-axis direction and a moving distance in the X-axis direction of the left portion of the eyepiece device  16  is the pupil-to-pupil distance. Also, the Y-axis moving distance may vary, for example, depending on a position of the eye on the face of the subject P. In addition, the moving distance in the Z-axis direction may vary, for example, depending on shapes of the nose, the forehead, and a portion of the forehead between the eyebrows of the subject P. 
     Here, even if the laser emitting unit  60  is moved in the X-axis direction, the Y-axis direction, or the Z-axis direction, a distance from the surface of the condenser  68  on the side facing the eyeball E to the laser focal point F does not change. 
     Furthermore, the rotation angle around the X-axis and the rotation angle around the Y-axis may vary depending on condition of the eyelid and eyelash of the subject P and a position in the retina of the subject P on which the test image is projected. 
     When conducting an eye examination, the position of the laser emitting unit  60  is caused to be adjusted by the subject P so that the subject P can see the test image best. The subject P visually recognizes the test image when the laser beam emitted from the laser emitting unit  60  passes through the pupil of the subject P and is emitted onto the retina. Accordingly, in the present embodiment, by letting the subject P adjust the position of the laser emitting unit  60  in the eyepiece device  16  so as to see the test image best, the parameter information indicating an optimum positional relationship between the laser light source  62  and the eyeball of the subject P can be obtained. 
     In the eyewear provision system  100  according to the present embodiment, the positional relationship between the laser light source and the eyeball of the subject P indicated by the parameter information is reflected in a relationship between a laser light source of the eyewear and an eyeball of a user of the eyewear. That is, in the eyewear provision system  100  according to the present embodiment, by causing a user who is to use the eyewear to conduct an eye examination using the eye examination device  10  and thereby obtaining the parameter information of the user, the user&#39;s eyewear is customized by using this parameter information. 
     According to the present embodiment, by using the parameter information as described above, in the eyewear manufacturing process for example, complicated steps of causing a user to try on the eyewear, manually adjusting a position of a laser light source, and the like, can be omitted. 
     Next, a functional configuration of the eye examination device  10  according to the present embodiment will be described with reference to  FIG. 6 .  FIG. 6  is a diagram illustrating functions of the eye examination device. 
     The eye examination device  10  according to the present embodiment includes an eye examination processing unit  110 . The eye examination processing unit  110  is embodied by the arithmetic processing device  13  reading out and executing a program stored in the storage device  14 . 
     The eye examination processing unit  110  according to the present embodiment includes an input receiving unit  111 , an image data reading unit  112 , an image projecting unit  113 , a parameter acquiring unit  114 , an eye examination result acquiring unit  115 , an output unit  116 , and a storage unit  117 . 
     The input receiving unit  111  receives various inputs directed to the eye examination device  10 . Specifically, the input receiving unit  111  receives an eye examination start request to the eye examination device  10 , an operating instruction from the operation device  17 , and the like. 
     The image data reading unit  112  reads out the test image data stored in the storage unit  117 . The image projecting unit  113  causes the laser emitting unit  60  to emit the laser beam L in accordance with the test image data that is read out, and projects the test image on the retina of the subject P. 
     The parameter acquiring unit  114  acquires parameter information of the eyepiece device  16  retained by the mechanism controller  15  according to an operation of the operation device  17 . 
     The eye examination result acquiring unit  115  causes the test image to be projected onto the retina of the subject P, and acquires information indicating a result of the eye examination for the subject P. 
     A method of acquiring the eye examination result information by the eye examination result acquiring unit  115  will be described here. For example, the eye examination device  10  according to the present embodiment may display an image for examination (test image) on the output device (display)  12  and the like of the eye examination device  10 , and let the subject P enter information of an area that the subject P could see. If it is difficult for the subject P to enter a result of the eye examination in a state of his/her eye being close to the eye examination device  10 , it is possible to ask an examination assistant to enter the data into the eye examination device  10 . In this case, for example, the subject P may read out a character visible to the subject P to inform the examination assistant of the area from which the character could be seen. In addition, if the eye examination device  10  has a voice input unit (microphone, etc.) and a speech recognition function, the result of the eye examination can be entered by the subject P reading out a character that the subject P could recognize. 
     The output unit  116  transmits the acquired parameter information to the terminal device  30 . The output unit  116  may store, into the storage unit, eye examination information and the like that has been acquired. 
     The storage unit  117  is, for example, a storage area provided in the storage device  14 , and stores the image data for inspection (test image data)  118 , the parameter information  119 , and the eye examination result information  120 . The image data for inspection  118  may be stored in the storage unit  117  in advance. The parameter information  119  and the eye examination result information  120  may be temporarily retained after an eye examination is conducted. 
     Next, information stored in the storage unit  117  will be described with reference to  FIGS. 7 to 9 .  FIG. 7  is a diagram illustrating an example of the test image according to the first embodiment. 
     The test image  711  according to the present embodiment is projected to the retina of the subject P by a laser beam emitted based on the image data for inspection  118 . 
     The test image  711  is divided into multiple regions, and an identifier is described in each of the regions to identify each of the regions. In the example of  FIG. 7 , the test image  711  is divided into nine regions, and an identifier is described in each of the regions to distinguish the regions. 
     In the present embodiment, for example, among identification numbers from 1 to 9 in the test image  711 , if there is an identification number that a subject (examinee) cannot visually recognize, the subject is judged that a visual field defect occurs in a portion of his/her retina corresponding to the area specified by the identification number. 
     Although  FIG. 7  illustrates a case in which the test image  711  is divided into nine regions, the test image  711  is not limited to this case. The test image  711  may be divided into regions of any number. Also, in  FIG. 7 , the test image  711  is divided into nine rectangular regions, but shapes of the regions are not limited thereto. The test image  711  may be divided into regions of any shape. Further, in  FIG. 7 , the identifier identifying each of the regions in the test image  711  is a number, but is not limited thereto. An identifier for identifying the region is not required to be a number, and a letter, an illustration, or the like may be used as an identifier. 
     The test image is not limited to the image illustrated in  FIG. 7 . For example, the test image may be a sandstorm image, Landolt rings, an ETDRS chart, an Amsler chart, or the like. 
       FIG. 8  is a diagram illustrating an example of parameter information of the first embodiment. The parameter information  119  of the present embodiment includes, for example, a pupil-to-pupil distance, a rotation angle about the X-axis, and a rotation angle about the Y-axis. Although not illustrated in  FIG. 8 , the respective moving distances in the X-axis direction, the Y-axis direction, and the Z-axis direction may also be included. 
       FIG. 9  is a diagram illustrating an example of the eye examination result information of the first embodiment. The eye examination result information  120  of the present embodiment includes, for example, identifiers of areas in the test image  711  that can be visually recognized by the subject P and identifiers of areas in the test image  711  that cannot be visually recognized by the subject P in the test image  711 . In the present embodiment, these identifiers allow determination of presence or absence of a visual field defect in the subject P. 
     In the example of  FIG. 9 , identifiers of the areas that can be visually recognized by a subject P are “2, 3, 5, 6, 8, and 9”, and identifiers of areas that cannot be visually recognized by the subject P are “1, 4, and 7”. Thus, with respect to this subject P, a visual field defect occurs in an area corresponding to the regions whose identifiers are “1, 4, and 7”. 
     In addition, the eye examination result information  120  may include, for example, a subjective symptom felt by the subject P. For example, the eye examination result information  120  in  FIG. 9  shows that a visual field of the subject P is distorted. 
     Next, an operation of the eye examination device  10  according to the present embodiment will be described with reference to  FIG. 10 .  FIG. 10  is a flowchart illustrating a process of the eye examination device according to the first embodiment. 
     In the eye examination device  10  according to the present embodiment determines whether or not the input receiving unit  111  of the eye examination processing unit  110  has received an eye examination start instruction (step S 1001 ). Specifically, the input receiving unit  111  may be deemed to have received the eye examination start instruction when a startup instruction of the eye examination device  10  is received. 
     In step S 1001 , when the eye examination start instruction is not received, the eye examination processing unit  110  waits until this instruction is received. 
     When the eye examination start instruction is received at step S 1001 , the eye examination processing unit  110  reads out the image data for inspection  118  from the storage unit  117 , and causes the image projecting unit  113  to project the test image (step S 1002 ). 
     Subsequently, the eye examination processing unit  110  determines whether or not a position of the laser emitting unit  60  in the eyepiece device  16  has been determined (step S 1003 ). Specifically, the eye examination processing unit  110  determines whether or not the input receiving unit  111  has received a notification indicating that the position of the laser emitting unit  60  has been determined. In the present embodiment, for example, when adjustment of the position of the laser emitting unit  60  is completed, an operation for notifying that the adjustment is completed may be performed by using the operation device  17 . Upon receiving this operation, the mechanism controller  15  may send a notification, to the arithmetic processing device  13 , indicating that the position of the laser emitting unit  60  has been determined. 
     If the position is not determined at step S 1003 , the eye examination processing unit  110  waits until the position is determined. If the position has been determined at step S 1003 , the eye examination processing unit  110  causes the parameter acquiring unit  114  to acquire the parameter information  119  indicating the position of the laser emitting unit  60  in the eyepiece device  16  through the mechanism controller  15 , and retains the parameter information  119  in the storage unit  117  (step S 1004 ). 
     Next, the eye examination processing unit  110  determines whether or not an input of an eye examination result is received by the input receiving unit  111  (step S 1005 ). If the input of the eye examination result is not received at step S 1005 , the eye examination processing unit  110  waits until the input of the eye examination result is received. 
     If the input of the eye examination result is received at step S 1005 , the eye examination processing unit  110  causes the eye examination result acquiring unit  115  to retain the result in the storage unit  117  as the eye examination result information  120  (step S 1006 ). 
     Subsequently, the eye examination processing unit  110  causes the output unit  116  to transmit the acquired parameter information to the terminal device  30  (step S 1007 ), and terminates the process. At this time, the output unit  116  may also transmit the eye examination result information  120  together with the parameter information  119  to the terminal device  30 . 
     As described above, according to the present embodiment, the eye examination device  10  acquires parameter information indicating a positional relationship between an eyeball of a subject P and a laser light source, and based on the positional relationship indicated by the parameter information, an eyewear to be used for the subject P is manufactured. Accordingly, the present embodiment can contribute to improvement of manufacturing efficiency of the eyewear. 
     Second Embodiment 
     Hereinafter, a second embodiment will be described with reference to the drawings. In the second embodiment, the eye examination device  10  is connected with a management device that manages an eye examination by the eye examination device  10 . In the following description of the second embodiment, an element having the same functional configuration as the first embodiment will be given the same symbol as that used in the description of the first embodiment, and the description thereof will be omitted. 
       FIG. 11  is a diagram illustrating an example of a system configuration of an eyewear provision system according to the second embodiment. 
     The eyewear provision system  100 A according to the present embodiment includes the eye examination device  10 , a management device  300 , and a terminal device  30 A. In the eyewear provision system  100 A, the terminal device  30 A and the management device  300  are connected with each other via a network or the like. Also, in the eyewear provision system  100 A, the management device  300  and the eye examination device  10  are connected so as to satisfy respective communication standards. 
     In the present embodiment, the eye examination device  10  and the management device  300  are included in an eye examination system  200 . In the example of  FIG. 11 , the number of the eye examination system  200  included in the eyewear provision system  100 A is one, but is not limited to one. Any number of the eye examination systems  200  may be included in the eyewear provision system  100 A. 
     In the eye examination system  200  according to the present embodiment, the eye examination device  10  outputs parameter information and eye examination result information to the management device  300 . 
     In the eye examination system  200  according to the present embodiment, the management device  300  manages the eye examination result information and the parameter information in association with user information. Further, the management device  300  transmits the parameter information to the terminal device  30 A. 
     In addition, the management device  300  according to the present embodiment includes an eye examination management processing unit  310 . The eye examination management processing unit  310  maintains user information about a user who conducts an eye examination, and performs the eye examinations by using a test image in accordance with an attribute of the user. 
     Specifically, the eye examination management processing unit  310  identifies an external server from which the test image is acquired, according to the attribute of the user, and acquires contents provided by the identified external server as the test image. In the example illustrated in  FIG. 11 , the test image is to be obtained from one of servers  400 ,  500 , and  600 , as an external server. 
     In the eyewear provision system  100 A according to the present embodiment, the terminal device  30 A includes a deflection angle setting processing unit  31 , and calculates and sets a deflection angle of a MEMS mirror installed in a light source unit of an eyewear, based on the parameter information received from the management device  300 . The deflection angle of the MEMS mirror indicates an optical scan angle. 
     Hereinafter, a hardware configuration of the management device  300  according to the present embodiment will be described with reference to  FIG. 12 .  FIG. 12  is a diagram illustrating an example of the hardware configuration of the management device. 
     The management device  300  according to the present embodiment includes an input device  301 , an output device  302 , a drive device  303 , an auxiliary storage device  304 , a memory device  305 , an arithmetic processing device  306 , and an interface device  307 , each of which is interconnected via a bus B. 
     The input device  301  inputs various types of information. The output device  302  outputs various types of information. The interface device  307  includes a modem, a LAN card, or the like, and is used to connect to a network. 
     An eye examination management program is at least a part of various programs controlling the management device  300 . The eye examination management program is provided, for example, by distribution of a recording medium  308  or by downloading from the network. As the recording medium  308  that stores the eye examination management program, various types of recording media can be used, such as a recording medium that optically, electrically, or magnetically records information, like a CD-ROM, a flexible disk, a magneto-optical disc, and the like, and a semiconductor memory that electrically records information, such as a ROM, a flash memory, and the like. 
     Also, when the recording medium  308  recording the eye examination management program is loaded in the drive device  303 , the eye examination management program is installed into the auxiliary storage device  304  via the drive device  303  from the recording medium  308 . The eye examination management program downloaded from the network is installed in the auxiliary storage device  304  via the interface device  307 . 
     The auxiliary storage device  304  stores necessary files, data, and the like, in addition to storing the installed eye examination management program. The memory device  305  reads out and stores the eye examination management program from the auxiliary storage device  304  when starting up a computer. The arithmetic processing device  306  embodies various processes to be described below, in accordance with the eye examination management program stored in the memory device  305 . 
     Because the terminal device  30 A according to the present embodiment is a general computer and has the same configuration as the management device  300 , the description thereof is omitted. 
     Next, with reference to  FIG. 13 , functional configurations of each device in the eyewear provision system  100 A according to the present embodiment will be described. 
       FIG. 13  is a diagram illustrating the functions of each device in the eyewear provision system according to the second embodiment. 
     First, functions of the management device  300  according to the present embodiment will be described. The management device  300  according to the present embodiment includes the eye examination management processing unit  310 , a user information database  330 , an attribute mapping database  340 , and a result database  350 . 
     The user information database  330  stores user information about a user who conducts an eye examination by using the eye examination device  10 . The attribute mapping database  340  associates information indicating a user attribute with information indicating the server from which contents are to be retrieved. The result database  350  stores user information and an eye examination result, by correlating the user information with an eye examination result. Details of each of the databases in the management device  300  will be described below. 
     The eye examination management processing unit  310  according to the present embodiment is embodied by the arithmetic processing device  306  reading out and executing the eye examination management program stored in the memory device  305  or the like. 
     The eye examination management processing unit  310  according to the present embodiment includes a user information acquiring unit  311 , an attribute determining unit  312 , an image acquisition source identifying unit  313 , a corresponding image acquiring unit  314 , an image processing unit  315 , an image data output unit  316 , an eye examination result acquiring unit  317 , an eyeball condition detecting unit  318 , a parameter transmitting unit  319 , and a result storing unit  320 . 
     The user information acquiring unit  311  acquires user information. The user information may be received, for example, by the input receiving unit  111  in the eye examination device  10 , and may be output to the management device  300 . Alternatively, the user information may be input by using the input device  301  or the like in the management device  300 . Details of the user information will be described below. 
     The attribute determining unit  312  determines an attribute of the user from information contained in the user information. The image acquisition source identifying unit  313  identifies an external server corresponding to the attribute of the user, by referring to the attribute mapping database  340 . 
     The corresponding image acquiring unit  314  acquires image data of the contents provided by the server specified by the image acquisition source identifying unit  313 . The image processing unit  315  processes the image data acquired by the corresponding image acquiring unit  314  to form the test image data. Details of a processing method performed by the image processing unit  315  will be described below. 
     The image data output unit  316  outputs the processed test image data to the eye examination device  10 . The eye examination result acquiring unit  317  acquires the parameter information and the eye examination result information from the eye examination device  10 . 
     The eyeball condition detecting unit  318  detects condition of an eyeball based on the eye examination result information, and outputs the condition as eyeball condition information. Specifically, the eyeball condition detecting unit  318  may retain reference information for determining condition of an eyeball, and may determine condition of an eyeball by comparing the eye examination result information with the reference information. 
     The parameter transmitting unit  319  transmits the parameter information obtained from the eye examination device  10  to the terminal device  30 A. The result storing unit  320  stores the parameter information and the eye examination result information obtained by the eye examination result acquiring unit  317  and the eyeball condition information into the result database  350 , in association with the user information. 
     Next, each of the databases in the management device  300  will be described. First, the result database  350  will be described. 
     The result database  350  according to the present embodiment stores result information  351  including the parameter information, the eye examination result information, and the eyeball condition information, in a manner in which the parameter information, the eye examination result information, and the eyeball condition information are associated with user information. The user information mentioned here is, for example, a user ID. 
     For example, in a case in which the user information of the result information  351  is a user ID of the subject P, the parameter information of the result information  351  is the parameter information  119  illustrated in  FIG. 8 , and the eye examination result information of the result information  351  is the eye examination result information  120  illustrated in  FIG. 9 . 
     In the eye examination result information  120 , identifiers of areas that can be visually recognized by the subject P are “2, 3, 5, 6, 8, and 9”, and identifiers of areas that cannot be visually recognized by the subject P are “1, 4, and 7” (see  FIG. 9 ). Accordingly, the eyeball condition detecting unit  318  determines that there is a visual field defect. In addition, if the eyeball condition detecting unit  318  retains the reference information stating that “if there is a visual field defect in a peripheral area of the test image=possibility of glaucoma”, the eyeball condition detecting unit  318  determines that there is a possibility of glaucoma with respect to the condition of the eyeball of the subject P. Therefore, in this case, the eyeball condition information will be “visual field defect is found/possibility of glaucoma”. 
     In the present embodiment, the eyeball condition detecting unit  318  is provided in the management device  300 , but is not limited thereto. The eyeball condition detecting unit  318  may be provided in the eye examination device  10 . In this case, the eye examination device  10  may transmit parameter information, eye examination result information, and eyeball condition information to the management device  300 . 
     Next, functions of the terminal device  30 A according to the present embodiment will be described. 
     The terminal device  30 A according to the present embodiment includes a deflection angle setting processing unit  31 . The deflection angle setting processing unit  31  according to the present embodiment is embodied by an arithmetic processing device of the terminal device  30 A reading out and executing a mirror control program stored in its storage device. 
     The deflection angle setting processing unit  31  according to the present embodiment includes a parameter receiving unit  32 , a deflection angle calculating unit  33 , and a deflection angle setting unit  34 . 
     The parameter receiving unit  32  acquires the parameter information transmitted from the management device  300 . The deflection angle calculating unit  33  determines a visually recognizable area on a retina of a user having conducted an eye examination, based on the parameter information. The deflection angle calculating unit  33  calculates a deflection angle of the MEMS mirror installed in the eyewear  50 , based on the obtained area. 
     The deflection angle setting processing unit  31  according to the present embodiment may retain various types of information used for calculating the deflection angle, such as specification information indicating a specification of the MEMS mirror of the eyewear  50 . 
     The deflection angle setting unit  34  sets the deflection angle calculated by the deflection angle calculating unit  33  to the eyewear  50 . 
     Next, the user information database  330  and the attribute mapping database  340  of the present embodiment will be described with reference to  FIGS. 14 and 15 .  FIG. 14  is a diagram illustrating an example of the user information database according to the second embodiment. 
     The user information database  330  according to the present embodiment includes, as items of information, a user ID, a password, gender, and an age. A value of the item “user ID” indicates an identifier for identifying a user of the eyewear provision system  100 A. A value of the item “password” is the user&#39;s password identified by the user ID. A value of the item “gender” indicates the user&#39;s sex, and a value of the item “age” indicates the user&#39;s age. In the user information database  330 , the item “user ID” and the other items are associated with each other, and the user information of the present embodiment is information including the value of the item “user ID” and the value of other items. 
     In the present embodiment, the value of the item “gender” and the value of the item “age” are used as information indicating the attributes of the user. The information indicating the attributes of the user is not limited to the items illustrated in  FIG. 14 . Information indicating user attributes may include, for example, items indicating user preferences. 
       FIG. 15  is a diagram illustrating an example of the attribute mapping database of the second embodiment. The attribute mapping database  340  according to the present embodiment includes, as items of information, an attribute and a corresponding server, and an item “attribute” and an item “corresponding server” are associated with each other. 
     The value of the item “attribute” is information indicating the attribute in the user information database  330 . The value of the item “corresponding server” indicates information that identifies a server(s) associated with the attribute. Specifically, the value of the item “corresponding server” may be a name of a server, or may be a URL (Uniform Resource Locator) or the like identifying a server. 
     In  FIG. 15 , for example, if the attribute of the user is “female”, a corresponding server is found to be the server  500 . In this case, the corresponding image acquiring unit  314  accesses the server  500  to acquire image data provided by the server  500 . The image data provided herein may be, for example, an advertisement image of a product for a woman. For example, if an age of a user is 10 or less, an image suitable for children may be used as the test image. 
     In the present embodiment, because an image corresponding to an attribute of a user is used as the test image, the user can conduct an eye examination with interest. 
     Next, image processing performed by the image processing unit  315  in the eye examination management processing unit  310  according to the present embodiment will be described with reference to  FIG. 16 .  FIG. 16  is a diagram illustrating the image processing according to the second embodiment. An image  161  in  FIG. 16  is an example of an image projected by image data before the image processing, and an image  161 - 1  is an example of an image projected by image data after the image processing. 
     The image  161  illustrated in  FIG. 16  is an image of contents acquired from a server identified based on the attribute mapping database  340 . 
     The image processing unit  315  according to the present embodiment applies image processing to the image of contents to a degree that the meaning of the content does not change. In the example illustrated in  FIG. 16 , a black frame  162  is superimposed on an outer periphery of the image  161  to form the test image  161 - 1 . 
     In the present embodiment, by applying image processing to image data, a user conducting an eye examination with the eye examination device  10  is, for example, more likely to notice a visual field defect at the outer peripheral portion of the visual field. 
     A method of image processing performed by the image processing unit  315  is not limited to the method illustrated in  FIG. 16 . For example, the image processing unit  315  may change color of an image representing the contents, or may change color density of an image. In addition, the image processing unit  315  may superimpose on an image representing contents, for example, a grid pattern or the like by which the image representing the contents is divided into multiple areas. 
     As described above, by applying image processing to an image by the image processing unit  315 , the visibility of the image can be enhanced even for a subject with eye disease such as retinopathy, and by reflecting the information in the user attribute database  330 , versatility is enhanced. 
     In the example of  FIG. 16 , an image of contents acquired from a server is a still image, but it is not limited thereto. An image of contents acquired from a server may be, for example, a video. 
     Next, an operation of the eyewear provision system  100 A according to the present embodiment will be described with reference to  FIG. 17 .  FIG. 17  is a sequence diagram illustrating the operation of the eyewear provision system according to the second embodiment. 
     In the eyewear provision system  100 A according to the present embodiment, when the management device  300  acquires the user information (step S 1701 ), the management device  300  determines an attribute(s) of a user based on the user&#39;s user information, and identifies a server from which image data is to be acquired (step S 1702 ). 
     Subsequently, the management device  300  issues an acquisition request of image data to the specified server (step S 1703 ). 
     Subsequently, the server having received the notification transmits image data to the management device  300  in response to the acquisition request (step S 1704 ). With respect to the aforementioned image data to be transmitted to the management device  300 , for example, the server may determine image data to be supplied in advance. 
     Subsequently, the management device  300  processes the acquired image data (step S 1705 ), and outputs, as the test image data, the processed image data to the eye examination device  10  (step S 1706 ). 
     The eye examination device  10  reads the acquired test image data (step S 1707 ), and projects the test image to perform an eye examination (step S 1708 ). Subsequently, the eye examination device  10  outputs parameter information and eye examination result information to the management device  300  (step S 1709  and step S 1710 ). 
     When the management device  300  acquires the eye examination result information, the management device  300  detects condition of an eyeball (step S 1711 ). Subsequently, the management device  300  stores the parameter information, the eye examination result information, and the eyeball condition information into the result database  350  in association with the user information (step S 1712 ). Next, the management device  300  transmits the parameter information to the terminal device  30 A (step S 1713 ). 
     When the parameter information is received, the terminal device  30 A calculates a deflection angle based on the parameter information (step S 1714 ). Subsequently, the terminal device  30 A sets the calculated deflection angle to the eyewear  50  (step S 1715 ). 
     As described above, according to the eyewear provision system  100 A of the present embodiment, the parameter information of the user who conducted the eye examination using the eye examination device  10  can be set to the eyewear  50 , and the eyewear  50  can be provided to the user. 
     In other words, in the eyewear provision system  100 A according to the present embodiment, when the management device  300  receives an input of user information, the management device  300  determines an attribute of a user of the eye examination device  10  based on the user information, and an eye examination is performed by using a test image according to the user. The eyewear provision system  100 A according to the present embodiment retains the user&#39;s eye examination result information and parameter information in the management device  300 , and the management device  300  transmits the parameter information from the management device  300  to the terminal device  30 A. The terminal device  30 A sets the received parameter information to the eyewear  50 . The terminal device  30 A of the present embodiment, which sets the parameter information to the eyewear  50 , may be a terminal device that controls a manufacturing device for manufacturing the eyewear  50 . 
     As described above, according to the eyewear provision system  100 A of the present embodiment, parameter information of a user who conducted the eye examination can be set to an eyewear  50 , to produce a user-specific eyewear  50  and to provide the eyewear  50  to the user. 
     Here, a use case of the eyewear provision system  100 A according to the present embodiment will be described. In the following example, the eye examination system  200  including the eye examination device  10  and the management device  300  is installed at an eyewear shop, and a terminal device  30 A, which serves as a terminal device for controlling an eyewear manufacturing apparatus, is installed in a manufacturing factory or the like for an eyewear  50 . 
     In the use case, when a user visiting an eyewear shop purchases his/her own eyewear, the user first conducts an eye examination using the eye examination system  200  installed at the shop. After the eye examination is conducted by the user, the eye examination system  200  retains the parameter information and the eye examination result information in the management device  300 , in association with user information of the user. In this case, the user information may include information for identifying the shop at which the eye examination system  200  is installed. 
     Next, the eye examination system  200  transmits, from the management device  300 , the parameter information together with the user information to the terminal device  30 A. In a manufacturing process of an eyewear, the terminal device  30 A causes the manufacturing apparatus to fit the laser emitting unit  60  to the eyewear based on the received parameter information. 
     The eyewear manufactured here is to be purchased by the user identified by the user information. Thus, the eyewear is delivered from the manufacturing factory to the shop, and is delivered to the user at the shop. 
     According to the present embodiment, eyewear can be provided to a user who has conducted an eye examination as described above. Therefore, according to the present embodiment, it is possible to eliminate burdens of various adjustments to customize an eyewear to a user, by trial fitting of the eyewear to the user. 
     Next, an operation of the management device  300  according to the present embodiment will be described with reference to  FIG. 18 .  FIG. 18  is a flowchart illustrating a process of the management device according to the second embodiment. 
     The eye examination management processing unit  310  of the management device  300  according to the present embodiment determines whether or not the user information is received by the user information acquiring unit  311  (step S 1801 ). If the user information is not acquired at step S 1801 , the eye examination management processing unit  310  waits until the user information is acquired. 
     If the user information is received at step S 1801 , the eye examination management processing unit  310  determines, by the attribute determining unit  312 , an attribute of the user, from the values of the items “gender” and “age” included in the user information (step S 1802 ). 
     Next, the eye examination management processing unit  310  causes the image acquisition source identifying unit  313  to identify the server corresponding to the attribute of the user by referring to the attribute mapping database  340  (step S 1803 ). Subsequently, the eye examination management processing unit  310  causes the corresponding image acquiring unit  314  to acquire image data from the identified server (step S 1804 ). Next, the eye examination management processing unit  310  obtains test image data by causing the image processing unit  315  to process the acquired image data, and causes the image data output unit  316  to output the test image data to the eye examination device  10  (step S 1805 ). 
     Next, the eye examination management processing unit  310  determines whether or not the parameter information and the eye examination result information were acquired from the eye examination device  10  by the eye examination result acquiring unit  317  (step S 1806 ). If the relevant information is not acquired at step S 1806 , the eye examination management processing unit  310  waits until the information is acquired. 
     If the relevant information is obtained at step S 1806 , the eye examination management processing unit  310  causes the eyeball condition detecting unit  318  to detect condition of the eyeball from the eye examination result information and to output the eyeball condition information (Step S 1807 ). 
     Subsequently, the eye examination management processing unit  310  causes the parameter transmitting unit  319  to transmit the parameter information to the terminal device  30 A (step S 1808 ). Next, the eye examination management processing unit  310  causes the result storing unit  320  to store the parameter information, the eye examination result information, and the eyeball condition information in the result database  350  in association with the user information (step S 1809 ), and terminates the process. 
     In the present embodiment, the eye examination management processing unit  310  obtains the test image data by causing the image processing unit  315  to apply image processing to the image data acquired by the corresponding image acquiring unit  314 , but the present embodiment is not limited thereto. The eye examination management processing unit  310  may output the image data acquired by the corresponding image acquiring unit  314  directly to the eye examination device  10  as test image data. 
     Next, an operation of the terminal device  30 A according to the present embodiment will be described with reference to  FIG. 19 .  FIG. 19  is a flowchart illustrating a process of the terminal device according to the second embodiment. 
     The deflection angle setting processing unit  31  of the terminal device  30 A according to the present embodiment determines whether or not the parameter information is received from the management device  300  by the parameter receiving unit  32  (step S 1901 ). If the parameter information is not received at step S 1901 , the deflection angle setting processing unit  31  waits until the parameter information is received. 
     If the parameter information is received at step S 1901 , the deflection angle setting processing unit  31  causes the deflection angle calculating unit  33  to determine, based on the parameter information, an area representing a visual field of the user corresponding to the parameter information (step S 1902 ). Specifically, for example, the deflection angle calculating unit  33  derives the area in which the laser emitting unit  60  in the eyepiece device  16  has scanned a laser beam, from the rotation angle around the X-axis in the eyepiece device  16 , the rotation angle around the Y-axis in the eyepiece device  16 , and the deflection angle of the MEMS mirror  63  in the laser emitting unit  60 . 
     Next, based on the area derived at step S 1902 , the deflection angle calculating unit  33  calculates a deflection angle of a MEMS mirror in the eyewear  50  (step S 1903 ). At this time, the deflection angle setting processing unit  31  may transmit the calculated deflection angle to the management device  300 , in a state in which the calculated deflection angle is associated with user information (user ID) of the user. The management device  300  may store the received deflection angle in association with the corresponding user information in the result database  350 . 
     Subsequently, the deflection angle setting processing unit  31  sets the calculated deflection angle to the eyewear  50  by using the deflection angle setting unit  34  (step S 1904 ), and terminates the process. Specifically, the deflection angle setting unit  34  transmits the calculated deflection angle to a controller in the eyewear  50 . The controller in the eyewear  50  sends the deflection angle to a drive controller that controls driving of the MEMS mirror of the eyewear  50 , to cause the drive controller to set the deflection angle. 
     In the present embodiment, a laser beam is emitted to an area based on a user&#39;s visual field. For example, in a case in which a visual field defect exists in a user&#39;s eye, the laser beam is not emitted to an area corresponding to the defect. Thus, the eyewear  50  can reduce waste of electric power corresponding to the area irradiated with the laser beam. 
     In the present embodiment, the deflection angle setting processing unit  31  is, but not limited to, provided in the terminal device  30 A to calculate the deflection angle. The deflection angle setting processing unit  31  may be, for example, provided in the management device  300 , or may be provided in the eye examination device  10 . 
     As described above, in the present embodiment, based on the parameter information, the eyewear  50  to be delivered to the user can be automatically configured to an extent that a laser beam can scan an area corresponding to a user&#39;s visual field. Accordingly, in the present embodiment, procedures for manufacturing and selling the eyewear  50  can be simplified, thereby contributing to improvement in manufacturing efficiency. 
     Further, according to the present embodiment, because an advertisement image corresponding to an attribute of a user is acquired as a test image, an eye examination can be conducted, for example, while providing information related to matters in which the user is likely to have interest. 
     Also, in the present embodiment, condition of a user&#39;s eyeball is detected from the eye examination result information, and the eyeball condition information is retained associated with user information of the user. Thus, according to the present embodiment, a user who conducts an eye examination can check condition of his/her own eyeball by a simple eye examination. Further, in the present embodiment, for example, in a case in which a user who has conducted an eye examination visits a medical institution, it is possible to provide the eye examination result information and the eyeball condition information to the user. 
     Third Embodiment 
     Hereinafter, a third embodiment will be described with reference to the drawings. The third embodiment differs from the second embodiment in that the management device is placed on a network. In the following description of the third embodiment, only differences from the second embodiment will be described, and for an element having the same functional configuration as the second embodiment, a symbol similar to that used in the description of the second embodiment is given, and the description thereof will be omitted. 
       FIG. 20  is a diagram illustrating an example of a system configuration of an eyewear provision system according to the third embodiment. 
     The eyewear provision system  100 B according to the present embodiment includes the eye examination device  10 , a management device  300 A, and the terminal device  30 . Note that the eyewear provision system  100 B may include the terminal device  30 A. 
     Each of the eye examination device  10  and the terminal device  30  is connected to the management device  300 A via a network. The management device  300 A is, for example, a server apparatus disposed in the cloud. 
     The management device  300 A according to the present embodiment includes the eye examination management processing unit  310 , the user information database  330 , the attribute mapping database  340 , the result database  350 , and an authentication processing unit  360 . 
     The authentication processing unit  360  according to the present embodiment performs an authentication process in order to determine whether or not there is an access right to the databases in the management device  300 A. 
     More specifically, the authentication processing unit  360  provides result information stored in the result database  350  to a user whose user information is stored in the user information database  330 . 
     For example, when the management device  300 A receives a set of a user ID and a password from the terminal device  30 , the management device  300 A determines whether or not the set of the user ID and password are stored in the user information database  330  by using the authentication processing unit  360 . When the authentication processing unit  360  determines that the corresponding set of the user ID and the password is found in the user information database,  330 , the management device  300 A extracts, from the result database  350 , result information including the input user ID, and transmits the result information to the terminal device  30 . 
     Further, for example, when an authentication code or the like that is pre-assigned to a medical institution or an eyewear shop provided with the eye examination device  10  is entered, the management device  300 A according to the present embodiment may transmit the result information associated with the authentication code to the terminal device  30  from which the authentication code is entered. In this case, in the management device  300 A, for each authentication code, user ID(s) included in the result information to be transmitted may be associated with the corresponding authentication code. 
     In the present embodiment, by grouping the result information for each authentication code, the result information of particular subject(s) can be provided, for example, to an educational institution such as a school for the blind, an association for persons with poor eyesight, or a support organization. 
     Fourth Embodiment 
     A fourth embodiment will be described below with reference to the drawings. The fourth embodiment describes application of the parameter information to an eyewear. In the description of the fourth embodiment below, an element having a functional configuration similar to that of the first to third embodiments will be given a symbol similar to that used in the description of the first to third embodiments, and the description thereof will be omitted. 
     First, a structure of the eyewear  50  will be described with reference to  FIG. 21 .  FIG. 21  is a diagram illustrating the structure of a retinal scanning type eyewear.  FIG. 21  illustrates a top view of the eyewear  50 . 
     The eyewear  50  according to the present embodiment includes a projection unit  51  and a control unit  52 . The projection unit  51  according to the present embodiment includes a light source  53 , a scanning mirror  54 , a reflection mirror  55 , and a projection mirror  56 . 
     In the eyewear  50  of the present embodiment, let a direction in which a light beam having entered the projection mirror  56  travels be an X-direction, and let a direction perpendicular to the X-direction in the projection mirror  56  be a Y-direction. 
     The scanning mirror  54  is a MEMS mirror, for example. The scanning mirror  54  scans laser light (light beam) L emitted from light source  53  in two dimensions, horizontally and vertically. The scanning mirror  54  also scans the light beam L emitted from the light source  53  in two dimensions to provide a projection light for projecting an image onto a retina  57  of a user&#39;s eyeball E. 
     The reflection mirror  55  reflects the light beam L scanned by the scanning mirror  54  toward a lens  58 . 
     The projection mirror  56  having a freeform surface is provided on a surface of the lens  58  at a side of the user&#39;s eyeball E. The projection mirror  56  projects an image to the retina  57  by irradiating the retina  57  of the eyeball E with the light beam L that has been scanned by the scanning mirror  54  and that has been reflected by the reflection mirror  55 . That is, the user can recognize the image by an afterimage caused by the laser light projected onto the retina  57 . The projection mirror  56  is designed such that a converging position of the light beam L scanned by the scanning mirror  54  is a pupil  59  of eyeball E. The light beam L enters the projection mirror  56  almost horizontally (i.e., almost from a —X direction). 
     In the present embodiment, if a curvature of the freeform surface of the projection mirror  56  is increased, a distance from the reflection mirror  55  to the converging position of the pupil  59  can be shortened, and the eyewear  50  can be reduced in size. 
     The control unit  52  of the present embodiment may be implemented, for example, by the terminal device  30  or the terminal device  30 A. 
     Next, the application of the parameter information obtained by the eye examination using the eye examination device  10  to the eyewear  50  will be described. With reference to  FIGS. 22A and 22B , a method of applying the pupil-to-pupil distance in the parameter information  119  to the eyewear  50  will be described. 
       FIG. 22A  illustrates an eyewear prior to the application of the pupil-to-pupil distance, and  FIG. 22B  illustrates an eyewear after the application of the pupil-to-pupil distance. 
     In the eyewear  50  according to the present embodiment, a laser emitting unit  60  is provided on a left eye side. The light source  53 , the scanning mirror  54 , the reflection mirror  55 , and the projection mirror  56  are included in this laser emitting unit  60 . 
     The laser emitting unit  60  is mounted to a frame of the eyewear  50  in a manner movable in the X-direction and the Y-direction, and the pupil-to-pupil distance of the parameter information  119  is reflected in the X-direction of the laser emitting unit  60 . 
     In the present embodiment, for example, as illustrated in  FIG. 22B , by moving the laser emitting unit  60  in the X-direction in accordance with a value of a pupil-to-pupil distance, the position of the laser emitting unit  60  adapted to the pupil-to-pupil distance of each user can be determined. 
     In order to move the laser emitting unit  60  in the X-direction, by inserting a spacer Sa or the like having a thickness corresponding to the pupil-to-pupil distance between a temple  49  and the laser emitting unit  60 , the position of the laser emitting unit  60  can be adjusted in accordance with the pupil-to-pupil distance, without using a complicated mechanism. Note that a configuration of moving the laser emitting unit  60  is not limited thereto, and other configurations, such as a configuration of moving the laser emitting unit  60  along the guide groove, may be adopted. 
     Although the present invention has been described based on the embodiments, the present invention is not limited to the requirements described herein, such as the configurations described above and combinations with other elements. These configurations can be changed to the extent that the gist of the present invention is not impaired, and can be suitably defined in accordance with application forms. 
     This international application is based on and claims priority to Japanese Patent Application No. 2016-253984 filed on Dec. 27, 2016, the entire contents of which are incorporated herein by reference. 
     DESCRIPTION OF REFERENCE SYMBOLS 
     
         
           10  eye examination device 
           16  eyepiece device 
           30 ,  30 A terminal device 
           31  deflection angle setting processing unit 
           40  parameter information 
           50  eyewear 
           60  laser emitting unit 
           100 ,  100 A,  100 B eyewear provision system 
           110  eye examination processing unit 
           200  eye examination system 
           300 ,  300 A management device 
           310  eye examination management processing unit 
           330  user information database 
           340  attribute mapping database 
           350  result database 
           360  authentication processing unit