Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1996-05-16
1998-09-08
Dang, Hung X.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351246, A61B 302, A61B 300
Patent
active
058052704
ABSTRACT:
An apparatus for performing assessments of field of vision that is portable, does not require the patient to adopt a particular posture or position relative to the testing device and may be operated so as to require minimal active responses from the patient is disclosed. The invention includes a patch, cover, or other device designed to occlude from ambient light and visually stimulate the subject eye. The interior of the patch facing the occluded eye includes an array of light sources, such as LEDs or LCD pixels, selective and sequential illumination of each source being controlled electrically by the practitioner, either manually or via a computer controller. The close proximity of the light sources to the eye being tested also minimizes anomalous results arising from poor visual acuity.
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patent: 4522474 (1985-06-01), Slavin
patent: 4685784 (1987-08-01), Kirchhuebel
patent: 4871247 (1989-10-01), Haynes
patent: 5293532 (1994-03-01), Marshall
patent: 5459536 (1995-10-01), Shalon et al.
patent: 5461436 (1995-10-01), Campbell
Dang Hung X.
Labbee Michael F.
Russell Dean W.
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