Diagnostic indirect ophthmalmoscopy contact lens system

Details Diagnostic indirect ophthmalmoscopy contact lens system Diagnostic indirect ophthmalmoscopy contact lens system

1989-10-27

1991-09-10

Dzierzynski, Paul M.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 300

Patent

active

050468367

ABSTRACT:
A compound diagnostic indirect ophthalmoscopy contact lens utilized for illumination and observation of the fundus of the eye including a plus powered meniscus aspheric contact element and a biconvex aspheric anterior element, each of the lens elements contributing positive refractive power to the optical system and co-acting to illuminate and form an aerial image of the fundus of the eye.

REFERENCES:
patent: 4410245 (1983-10-01), Koester
patent: 4728183 (1988-03-01), Heacock et al.

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