Small, simple and cost-effective scheiner-principle optometer wi

Details Small, simple and cost-effective scheiner-principle optometer wi Small, simple and cost-effective scheiner-principle optometer wi

1991-12-30

1993-06-29

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351211, 351223, 351237, 351239, A61B 302, A61B 310

Patent

active

052238660

ABSTRACT:
A Scheiner-principle optometer for automated assessment of accommodative state is disclosed. The specific advantages of the instant invention over earlier ones are: a) simplicity of design, b) hand held, portable implementation, c) light weight, d) small size, e) low manufacturing cost, and, f) the use of a monochromatic light source to eliminate the effects of chromatic aberrations in the subject's eye.

REFERENCES:
patent: 4778268 (1988-10-01), Randle
patent: 4943151 (1990-07-01), Cushman
patent: 4997269 (1991-03-01), Cushman
Helmholtz's Treatise on Physiological Optics (translated) Edited by James C. Southall, vol. 1, pp. 124-126 & 133 (1962).

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