Phoropter

Details Phoropter Phoropter

1982-04-15

1983-05-31

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351235, A61B 310, A61B 302

Patent

active

043858139

ABSTRACT:
Method for obtaining cross cylinder-like actions for using the adjusting or aligning measurement known as the cross cylinder method in phoropters for subjective refraction, wherein the spherical and cylindrical lens discs of the phoropter are adjusted in preprogrammed manner to cross cylinder-like lens systems.
The set problem is also solved by a phoropter with spherical test lenses and cylindrical lenses arranged on lens discs and which can be introduced into the observation optical path, wherein the motor drives of the lens discs are combined in a program control unit, connected to an operating unit and an indicating unit.

REFERENCES:
patent: 1873356 (1932-08-01), Stimson et al.
patent: 4185896 (1980-01-01), Buhler

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