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Apparatus and method for determining characteristics of a human retina using entoptically observed leukocytes and other psychophysical phenomenona

Image Number 16 for United States Patent #5640220.

An apparatus and method for comparing entoptically observed corpuscles with computer simulated images of corpuscle-like particles without requiring the observer to view more than one screen. Also disclosed are an apparatus and method for determining and documenting the size of the foveal avascular zone (FAZ). And an apparatus and method are disclosed for determining changes in the observer's leukocyte characteristics due to blue light flicker stimulation.

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