Ophthalmic measuring apparatus with improved alignment

Details Ophthalmic measuring apparatus with improved alignment Ophthalmic measuring apparatus with improved alignment

1996-02-02

2000-04-25

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351208, A61B 310

Patent

active

060536144

ABSTRACT:
An ophthalmic measuring apparatus in one aspect of the invention for examining the crystalline lens of an eye having a measuring unit which projects a measuring light beam on the crystalline lens of the eye and receives the measuring light scattered by the crystalline lens comprises: a reference position setting means for setting a reference position for the eye in a three-dimensional space; a moving means for moving the measuring unit in a three-dimensional space relative to the eye; and a displacement detecting means for detecting the displacement of the measuring unit from the reference position for the eye. An ophthalmic measuring apparatus in another aspect of the invention, which irradiates the eyeball of an eye with a collimated beam of laser light and guides the laser light scattered by molecules of the crystalline lens of the eye through a light receiving optical system to a photoelectric transducer, comprises an observation optical system for observing the front of the eye, and a magnification changing means for changing the observation magnification of the observation optical system.

REFERENCES:
patent: 4702576 (1987-10-01), Magnante
patent: 5337095 (1994-08-01), Katsuragi et al.

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