Ophthalmic apparatus

Details Ophthalmic apparatus Ophthalmic apparatus

1991-07-30

1993-07-27

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351211, 351203, A61B 300

Patent

active

052314308

ABSTRACT:
An ophthalmic apparatus includes a lens having a diameter greater than the distance between the pupils of the eyes of a user to be tested, adapted to be disposed in front of the eyes, a first visual target, including a visual target portion and a surrounding field of view defining portion, disposed at or near a focal plane of the lens, and a light source for illuminating the visual target portion and the surrounding field of view defining portion.

REFERENCES:
patent: 4929865 (1990-05-01), Blum

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