Scheiner-principle pocket optometer for self evaluation and bio-

Details Scheiner-principle pocket optometer for self evaluation and bio- Scheiner-principle pocket optometer for self evaluation and bio-

1990-02-28

1991-03-05

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Eye exercising or training type

351211, 351223, 351239, 351243, A61B 300

Patent

active

049972693

ABSTRACT:
A method and optometer apparatus for measuring the accommodative state of eye of a subject is disclosed. In a preferred embodiment, the optometer apparatus includes: a pinhole aperture plate having a center and a plurality of apertures in the pinhole aperture plate for viewing by the subject's eye; a positive lens disposed near the pinhole aperture plate and having an optical axis coincident with the center of the pinhole aperture plate; and scaled means inclined away from the positive lens for indicating to the subject the accommodative state of the subject's eye in diopters.

REFERENCES:
patent: 3787112 (1974-01-01), Lyons
patent: 4222639 (1980-09-01), Sheedy
patent: 4943151 (1990-07-01), Cushman

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