Apparatus for and method of testing visual acuity

Details Apparatus for and method of testing visual acuity Apparatus for and method of testing visual acuity

1987-02-09

1989-06-13

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351209, A61B 300

Patent

active

048386847

ABSTRACT:
A hand-held, rotatable, cylindrical drum provided with a series of sequentially interchangeable stimulus patterns that cover the drum which, when rotated in front of a patient, induces optokinetic nystagmus which is used to non-verbally assess the visual acuity of a patient.

REFERENCES:
patent: 1415511 (1922-05-01), Bausch
patent: 1827954 (1931-10-01), Ohm
patent: 3623799 (1971-11-01), Millodot

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