Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1977-06-02
1980-02-12
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 35, 351 25, 351 17, A61B 302
Patent
active
041880978
ABSTRACT:
A method of and apparatus for determining the visual integrity of an individual is disclosed. An equal amount of visible light intensity is provided to the right and left eyes by viewing a target through a binocular viewing mechanism. The eyes of the individual are adapted to the equal intensities of light for an adaptation period and the individual then adjusts the light intensity until the perceived light intensity in each eye is equal. The difference between the light intensities provided to the right and left eyes are measured, which provides an indication of the visual integrity of the individual.
REFERENCES:
patent: 2294382 (1942-09-01), Burian
patent: 3205505 (1965-09-01), Fletcher et al.
patent: 3801188 (1974-04-01), Hunt et al.
Flynn et al., Brightness Matching in Strabismic Amblyopia.
Burian et al., Binocular Vision and Ocular Motility, 1974.
Eastman et al., Instrument with Variable Beam Splitter, for Measuring Contrast Sensitivity.
Luminance, Contrast Function and Visual Acuity in Functional Amblyopia, Lawwill et al.
Gunkel et al., Colorimetry by a New Principle, 2/78.
Bovernick Rodney B.
Corbin John K.
Reiter Bernard A.
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