Patent ID: 6685320
Filing Date: 2004-02-03
Classification: A61B

Abstract:
An ophthalmic characteristic measuring apparatus, comprising:a first light source for emitting a first light flux of a first wavelength of near infrared; a first illumination optical system for illuminating a minute region on a retina of a subject eye with the light flux from the first light source; a first light receiving optical system for receiving a part of a first reflected light flux of the first light flux from the first light source, reflected from the retina of the subject eye, through a first conversion member for converting it into at least 17 beams; a first light receiving section for receiving a first received light flux guided by the first light receiving optical system to form a first signal; a second light source section for emitting a second light flux of near infrared having a second wavelength longer than the first wavelength of the first light flux; a second illumination optical system for illuminating a vicinity of the cornea of the subject eye with the second light flux from the second light source and with a predetermined pattern; a second light receiving optical system for receiving a second reflected light flux of the second light flux from the second light source, reflected from the vicinity of the cornea of the subject eye; a second light receiving section for receiving a second received light flux guided by the second light receiving optical system to form a second signal; a display section for displaying, as an image, the first and/or the second signal from the first light receiving section and/or the second light receiving section; an input section for selecting the first and/or the second signal used for a calculation processing on the basis of an image display of the first and/or the second signal displayed on the display section; and a calculation section for obtaining optical characteristics of the subject eye and a corneal shape of the subject eye on the basis of first and second signals corresponding to the first and/or second signal selected by the input section.