Refractively corrected, wavelength selective, transparent occlud

Details Refractively corrected, wavelength selective, transparent occlud Refractively corrected, wavelength selective, transparent occlud

1996-10-24

1998-09-08

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351226, A61B 302

Patent

active

058052712

ABSTRACT:
An embodiment of the present invention is a refractively corrected, wavelength selective, transparent visual field test occluder for a non-tested eye used in a visual field testing apparatus which uses a stimulus that produces light in a first color spectral range and a background illumination that produces light in a second color spectral range, the visual field test occluder comprising: (a) a base; (b) a fastener configured to fasten the base over a subject's eye; (c) a mounting affixed to the base configured to hold a filter and a refractive lens; and (d) a filter held in the mounting; wherein the filter substantially prevents transmission of light in the first color spectral range and substantially transmits light in the second color spectral range.

REFERENCES:
patent: 2835162 (1958-05-01), Harrington et al.
patent: 5220361 (1993-06-01), Lehmer et al.
patent: 5461436 (1995-10-01), Campbell

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