Patent ID: 7204591

Claim:
A non-shrouded device comprising: a plurality of individually programmable light emitting diodes; a plurality of convex lenses, each associated with a respective one of the programmable light emitting diodes; a test pattern disposed among the programmable light emitting diodes; wherein the light emitting diodes are programmed to focus light in a variable circular or other pattern whose diameter is such that the focused light pattern image is protected at different distances outside the macular area of the subject's retina, and such that a variable programmable brightness of each individual light emitting diode is used to determine specific points at which the subject is no longer able to accurately differentiate the test pattern; wherein contrast sensitivity, accommodation, convergence and acuity of the subject are computed from said specific points; and wherein the test pattern is be used to determine the an optimum sunglass or filter color and density for the subject based on said computed contrast sensitivity, accommodation, convergence and acuity.