Ophthalmic measuring apparatus

Details Ophthalmic measuring apparatus Ophthalmic measuring apparatus

1996-02-02

1998-01-06

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351210, 351221, A61B 314, A61B 310

Patent

active

057060720

ABSTRACT:
An ophthalmic measuring apparatus is provided for automatically detecting blinking and insufficient fixation of an eye under examination, and the light reflected from the cornea, as well as for automatically correcting the variation of sensitivity of the apparatus without using any special calibration devices, in order to obtain highly reliable measurements. The apparatus comprising a laser beam projecting optical system for emitting and converging a laser beam to the crystalline lens of the eye and a scattered light detecting optical system for detecting light scattered by the protein molecules within the crystalline lens through a light-receiving optical system into a photoelectric transducer in order to measure the crystalline lens on the basis of the output signals of the photoelectric transducer.

REFERENCES:
patent: 5090799 (1992-02-01), Makino et al.

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