Corneal endothelial cell photographing apparatus

Details Corneal endothelial cell photographing apparatus Corneal endothelial cell photographing apparatus

1999-12-22

2000-12-26

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 314

Patent

active

061647780

ABSTRACT:
A corneal endothelial cell photographing apparatus comprises a first slit plate provided with a slit, a photographing light projecting optical system for obliquely projecting photographing light for photographing a corneal endothelial cell of an eye to be tested through the slit of the first slit plate on the eye, an observation light projecting optical system for projecting observation light through the slit of the first slit plate on the eye for observation prior to photographing the corneal endothelial cell of the eye, an observing and photographing optical system for guiding the observation light reflected from the cornea of the eye and the photographing light reflected from the cornea of the eye to an image pickup device for the observation and photographing of the corneal endothelial cell of the eye, a second slit plate provided with a slit narrower than that of the first slit plate, and a Z-alignment measuring light projecting optical system for projecting alignment measuring light through the slit of the second slit plate on the eye to measure the position of a main unit of the corneal endothelial cell photographing apparatus relative to the eye with respect to directions along the optical axis of the eye.

REFERENCES:
patent: 4396260 (1983-08-01), Takizawa et al.
patent: 4597650 (1986-07-01), Yoshino et al.
patent: 5250965 (1993-10-01), Abe et al.

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