Brightness acuity tester

Details Brightness acuity tester Brightness acuity tester

1986-04-01

1988-11-15

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351272, 351221, A61B 302, A61B 310

Patent

active

047844833

ABSTRACT:
A brightness acuity tester to assess functional visual acuity in bright light conditions and to test for recovery of visual activity after photostressing the retina is disclosed. The tester essentially comprises a device closed in one direction and open in an opposite direction, an aperture provided in the device, a source of illumination mounted within the device, a plug designed removably to be positioned in the aperture to seal the same, and a power source coupled to the source of illumination via a switch. Preferably, the source of illumination is provided with anintensity control and the power source with a voltage regulator. Preferably, the device comprises a reflector having diffusely reflecting characteristics. Preferably, the power source is a battery, making the tester a hand-held one.

REFERENCES:
patent: 2209728 (1940-07-01), Higley
patent: 2471652 (1949-05-01), Papritz

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