Diagnostic indirect ophthmalmoscopy contact lens system
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United States of America Patent
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Sep 10, 1991
Grant Date -
N/A
app pub date -
Oct 27, 1989
filing date -
Oct 27, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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