Patent ID: 8162481
Filing Date: 2012-04-24
Classification: A61B

Abstract:
1. An operational method for a static visual field scanning apparatus comprising: A step of means for generating, on an output device, a visual field scanning screen for scanning a visual field of a subject using a static visual target; A step of means for setting an area to be scanned by the static visual target, as a scanning region, on the visual field scanning screen that is generated, on the output device, by said step of visual field scanning screen generating means; A step of means for displaying and controlling a fixation image to be fixated by the subject, during a visual field scanning, on the visual field scanning screen generated by said step of visual field scanning screen generating means; A step of means for setting at least one scan line on said visual field scanning screen; A step of means for setting at least one scanning point along the scan line set by said step of scan line setting means; A step of means for displaying and controlling the static visual target at a scanning point among the scanning points, to scan the visual field corresponding to said scanning point, which are set, along the scan line, by said step of scanning point setting means; A step of means for detecting the response to be made, via a first input device, at the time when the static visual target, displayed by said step of visual target displaying and controlling means, is perceived; A step of means for detecting the response to be made, via a second input device, at the time when the static visual target, displayed by said step of visual target displaying and controlling means, cannot be perceived; A step of means for generating a visual field mapping screen, on an output device, to map and display the subject's visual field; A step of means, through said step of visual target displaying and controlling means, for continuing the scan of the visual field corresponding to a next scanning point by displaying the static visual target to scan the visual field corresponding to the next scanning point, at the next scanning point among the scanning points set by said step of scanning point setting means, immediately after stopping displaying, promptly when detecting the response via said first input device through said step of the first detection means, the static visual target displayed by said step of visual target displaying and controlling means at the time of said detection; A step of means, through said step of visual target displaying and controlling means, for continuing the scan of the visual field corresponding to a next scanning point by displaying the static visual target to scan the visual field corresponding to the next scanning point, at the next scanning point among the scanning points set by said step of scanning point setting means, immediately after stopping displaying, promptly when detecting the response via said second input device through said step of the second detection means, the static visual target displayed by said step of visual target displaying and controlling means at the time of said detection; A step of means for storing in a memory device the coordinates of the static visual target displayed, either at the time of the response via said first input device being detected through said step of the first detection means or at the time of the response via said second input device being detected through said step of the second detection means, by said step of visual target displaying and controlling means; A step of means for, when the response via said second input device is detected by said step of the second detection means, recording, in reference to the coordinates stored in the memory device at the time of said detection by said step of visual target display coordinates storing means, at a position of said visual field mapping screen which corresponds to said coordinates, a symbol which represents the inability to visually perceive the static visual target displayed at said coordinates by said step of visual target displaying and controlling means; A step of means, through said step of continuing the scan of the visual field corresponding to a next scanning point immediately after detection by the first input device means, for, when the response via said first input device is detected by said step of the first detection means, making a judgement, using an arithmetic unit, about whether the scan of the scanning points along a scan line which the static visual target displayed by said step of visual target displaying and controlling means at the time of said detection, belonged to and lay at has been completed or not; A step of means, through said step of continuing the scan of the visual field corresponding to a next scanning point immediately after detection by the second input device means, for, when the response via said second input device is detected by said step of the second detection means, making a judgement, using the arithmetic unit, about whether the scan of the scanning points along a scan line which the static visual target displayed by said step of visual target displaying and controlling means at the time of said detection, belonged to and lay at has been completed or not; A step of means, through said step of continuing the scan of the visual field corresponding to a next scanning point immediately after detection by the first input device means, for, when the scan of the scanning points on a scan line is judged to be uncompleted by said step of the first completion judgement means, designating through the calculation of the arithmetic unit as the next scanning point the scanning point that shares the scan line with, and is adjacent to, the static visual target displayed at the time of the response via said first input device being detected through said step of the first detection means, by said step of visual target displaying and controlling means, and for, when the scan of the scanning points on a scan line is judged to be completed by said step of the first completion judgement means, through the calculation of the arithmetic unit, switching the scan line for scanning to the scan line adjacent to the scan line which the static visual target displayed by said step of visual target displaying and controlling means at the time of the response, via said first input device, being detected through said step of the first detection means, belonged to and lay at, and designating as the next scanning point the scanning point that lies in an edge of said scan line; And a step of means, through said step of continuing the scan of the visual field corresponding to a next scanning point immediately after detection by the second input device means, for, when the scan of the scanning points on a scan line is judged to be uncompleted by said step of the second completion judgement means, designating through the calculation of the arithmetic unit as the next scanning point the scanning point that shares the scan line with, and is adjacent to, the static visual target displayed at the time of the response via said second input device being detected through said step of the second detection means, by said step of visual target displaying and controlling means, and for, when the scan of the scanning points on a scan line is judged to be completed by said step of the second completion judgement means, through the calculation of the arithmetic unit, switching the scan line for scanning to the scan line adjacent to the scan line which the static visual target displayed by said step of visual target displaying and controlling means at the time of the response, via said second input device, being detected through said step of the second detection means, belonged to and lay at, and designating as the next scanning point the scanning point that lies in an edge of said scan line.