| 摘要 |
PROBLEM TO BE SOLVED: To determine the range and part of the fundus oculi to be photographed, without observing the fundus oculi on the basis of an image of the anterior part of the eye. SOLUTION: Light beams from a fixation target 10 are reflected by an optical-path selecting double-sided mirror 6, transmitted through an optical path switching mirror 3, and projected via an objective lens 1 onto the eye E to be examined. An anterior eye light beam illuminated by an infrared light source 2 is reflected by the optical path switching mirror 3 after passing through the objective lens 1, then passes through a mirror 11, a lens 12, and a mirror 13, is reflected by the optical-path switching double-sided mirror 6, and picked up as an image of the anterior part of the eye by an image pickup means 7. Signals from the image pickup means 7 are inputted to a computing means 8 and the center position of a pupil image and the position of a corneal reflex image formed by the infrared light source 2 are computed. A diagram K of the fundus oculi is displayed on a television monitor 9 according to the direction of the visual axis calculated. The position of the fixation target 10 is also displayed on the television monitor 9 as a mark M. When the subject views the fixation target 10, the macula B coincides with the mark M. The subject moves the fixation target 10 while watching the television monitor 9 to adjust the photographic range of the fundus oculi that enters a photographic frame S.
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