Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1992-01-23
1993-08-03
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351211, 128745, A61B 310
Patent
active
052333736
ABSTRACT:
A pattern ERG (PERG) projector (FIG. 2a) includes a coherent light source (32) for generating a projection beam, modulation optics (34) for modulating the projection beam with an alternating ERG interference pattern (with a selected spatial and alternation frequency), segmentation optics 35 for selectively segmenting the ERG interference pattern, and wide-angle imaging optics (36) for focusing the projection beam such that it passes through the pupil, and then diverges to project onto the entire retinal field-of-view, including the anterior retina out to the far periphery. A PERG testing program can be used to selectively probe the entire retina and develop a retinal map--PERG data has been correlated with retinal ganglion cell viability, and is therefore useful in diagnosing and monitoring retinal degeneration caused by glaucoma and other diseases.
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Peters Daniel R.
Taboada John
Bovernick Rodney B.
Ryan J. P.
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