Ophthalmologic apparatus

Details Ophthalmologic apparatus Ophthalmologic apparatus

1998-05-13

1999-11-02

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

059757019

ABSTRACT:
An ophthalmologic apparatus is provided which comprises a slit light projecting optical system (60) for projecting a slit beam of light from an oblique direction onto the cornea (C) of a subject's eye, a light receiving optical system (70) for receiving light reflected by the cornea (C), a corneal thickness measuring circuit (74) for measuring the thickness of the cornea from information on the received light of the light receiving optical system (70), an index light projecting optical system (90) for projecting from an oblique direction onto the cornea (C) an index beam of light having a larger width than the slit beam, and a line sensor (72) for receiving the index beam reflected by the cornea (C).

REFERENCES:
patent: 4019813 (1977-04-01), Cornsweet et al.
patent: 4810085 (1989-03-01), Fukuma et al.
patent: 5349398 (1994-09-01), Koester

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