Retinometer

Details Retinometer Retinometer

1976-07-20

1978-11-14

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 36, 351 15, 351 11, 351 14, A61B 310, A61B 300

Patent

active

041253205

ABSTRACT:
A laser interference instrument for determination of the visual acuity of the human eye includes an interference optical system for producing an interference light pattern mounted on a slit lamp microscope disposed on an instrument support that is finely adjustable horizontally and in height. The interference optical system includes a laser light source and a rotatable turntable carrying a plurality of plane parallel plates or wedge plates which may be selectively moved into the light path of the laser light source to produce different interference patterns to be projected onto the human eye and which are then observable through the slit lamp microscope.

REFERENCES:
patent: 1806318 (1931-05-01), Tillyer
patent: 2428975 (1947-10-01), Lamb
patent: 3536381 (1970-10-01), Pituley
patent: 3652153 (1972-03-01), Gambs
patent: 3942879 (1976-03-01), Pledger
patent: 3969020 (1976-07-01), Lynn
patent: 4009940 (1977-03-01), Ohzu
P. Hariharan, Applied Optics, vol. 14, No. 5, May 1975, pp. 1056, 1057.

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