Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Methods of use
Patent
1996-05-21
1999-08-31
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Methods of use
351237, A61B 300
Patent
active
059460750
ABSTRACT:
A method for detecting the presence of eye disease in a human eye. A test subject is presented with a fixation target positioned on a colored planar surface. The test subject focuses a test eye on the fixation target and positions the test eye a sufficient separation distance from the fixation target and aligns the test eye relative to said fixation target so that the test subject's central and peripheral visual health can be tested. Additional marks are presented on the planar surface for detection by said test subject using the peripheral vision of the test eye. The additional marks are primarily the same level of black-white contrast as the planar surface but different in hue to create color contrast symbols, and are presented within the field of vision of an eye not afflicted with the disease for which testing is being conducted. In this way, the presence of eye disease can be detected if the additional marks are not visible to the test subject.
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