| 摘要 |
PROBLEM TO BE SOLVED: To stabilize fixation and accurately graps the central eye socket position by projecting a target for confirming the position of the center socket of a patient's eye on the eye grounds part, and fixing the patient's eye to put the center socket in a designated position. SOLUTION: The respective light sources of an illuminating optical system 10 and an index projection optical system 20 are lighted, a joy stick is operated, and a slit lamp delivery is moved to illuminate the eye grounds part ER of a patient's eye. That is, light emitted from the index projection light source 21 is passed through a collimator lens 22, a target plate 23, an index lens 25, a mirror 24, and a projection lens 16a to be reflected by a split mirror 18a. Thus, an image of a cross target of the target plate 23 is formed on the eye grounds part ER of a patient's eye. The patient is instructed to fix his eyes on the center of the cross target. Accordingly, fixation is stabilized and the center socket position can be accurately grasped. |
