Coaxial ophthalmoscope arrangement

Details Coaxial ophthalmoscope arrangement Coaxial ophthalmoscope arrangement

1976-07-19

1977-12-20

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 12, A61B 312

Patent

active

040638065

ABSTRACT:
An improved coaxial ophthalmoscope incorporating both a light trap for absorbing substantially all of the light not utilized for illuminating the eye under examination, and thereby preventing the unused light from reflecting back into the eye of the viewer thus obscuring the vision thereof, and a filtering means for filtering out the light reflected from the cornea of the eye under examination but allowing the light reflected from the retina to pass therethrough.

REFERENCES:
patent: 2180015 (1939-11-01), Moulton
patent: 2214802 (1940-09-01), Tillyer
patent: 3984157 (1976-10-01), LeVantine

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