Perimetric eye testing device

Details Perimetric eye testing device Perimetric eye testing device

1976-02-20

1977-12-20

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 35, 351 36, A61B 302, A61B 304

Patent

active

040638073

ABSTRACT:
A perimetric eye examination device is provided having light-emitting diodes for the respective light sources which are perceived during the eye examinations. These light-emitting diodes are controllable for their brightness, either in linear dependence on the current, or in linear dependence on the pulse width repetition ratio of current pulses supplied to the light-emitting diode. The brightness perceived from the respective light-emitting diodes on the surface of the perimetric eye examination device also may be varied in accordance with physiological characteristics of the eye wherein the light-emitting diodes are distributed on the surface of the device with the brightness increasing from the central area of the observation area toward the periphery of the observation area.

REFERENCES:
patent: 3421498 (1969-01-01), Gans
patent: 3837734 (1974-09-01), Regan
Theodore E. Cohen et al., "The Drodewand . . . Perimetry," Am. J. Optom & Physiol Optics, vol. 51, No. 12, Dec. 1974.

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