Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1995-09-18
1997-07-01
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351211, A61B 314, A61B 310
Patent
active
056443757
ABSTRACT:
An ophthalmic apparatus comprising an examining system for examining an eye, wherein the examining system is operated after aligned at a predetermined position with respect to the eye to be examined, comprises the first system for moving the examining system in accordance with operation by an examiner with respect to the eye to be examined, a system for forming alignment indexes on the eye to be examined, a system for detecting the alignment indexes formed on the eye, a system for judging whether or not the alignment indexes detected by the index detecting system are within a predetermined area with respect to the examining system, the second system for further moving the examining system in addition to movement by the first moving system, and a system for controlling, when the judging system judges that the alignment indexes are within a predetermined area, the second moving system to perform alignment based on results from the index detecting system.
REFERENCES:
patent: 4607922 (1986-08-01), Humphrey
patent: 5381194 (1995-01-01), Nishio et al.
patent: 5502521 (1996-03-01), Katou
Mai Huy
Nidek Co. Ltd.
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