Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1984-02-22
1986-10-21
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351243, A61B 302
Patent
active
046182314
ABSTRACT:
A novel instrument and method for measuring the accommodative amplitude and speed of the eye of a subject is described. The instrument for making the measurements according to the present invention comprises a pair of illuminated or luminous visual displays disposed for viewing along an optical axis, the images of the displays superimposed upon each other for viewing by a subject, one of the displays comprising a pattern having a plurality of distinct and recognizable orientations with respect to the axis along which it is viewed, an orientation generator for randomly and alternately generating one of the orientations for viewing by the subject, a switch operable by the subject for turning the displays off and indicating the observed orientation of the random pattern, and a recorder for recording the last displayed orientation and the time the displays were on or the time between presentation of one display and the correct identification of the other.
REFERENCES:
patent: Re28921 (1976-08-01), Haines et al.
patent: 3947099 (1976-03-01), Grolman et al.
patent: 3969020 (1976-07-01), Lynn et al.
patent: 4105302 (1978-08-01), Tate
patent: 4155632 (1979-05-01), Wolbarsht
patent: 4283126 (1981-08-01), Reiner
patent: 4408846 (1983-10-01), Balliet
patent: 4533221 (1985-08-01), Trachtman
Genco Louis V.
Task Harry L.
Bovernick Rodney B.
Scearce Bobby D.
Singer Donald J.
The United States of America as represented by the Secretary of
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