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AssigneeM&S Technologies, Inc.
InventorJack T. Holladay
Estimating the term…
A set of visual targets and a method for using these targets to evaluate the spatial frequency response and contrast sensitivity of the human visual system. The invention includes four choice test, six choice test, sinusoidal bulls eye and fundamental sinusoidal letters or optotype targets. The four and six choice targets feature sinusoidal gratings oriented vertically, horizontally and at angles thereto. The sinusoidal bull's eye target features concentric circular light and dark areas with brightness varying in a radial sinusoidal fashion. The fundamental sinusoidal optotype target features an optotype, such as a letter, that is made up of strokes, each of which have a width that is equal to ½ of a single sinusoidal period.
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A substantially sinusoidal bull's eye target for testing spatial frequency and contrast sensitivity comprising concentric circular light and dark areas with brightness varying in a substantially sinusoidal fashion and having a spatial frequency and a contrast level.
A set of targets for testing spatial frequency and contrast sensitivity comprising:
A fundamental substantially sinusoidal optotype target for testing spatial frequency and contrast sensitivity comprising an optotype constructed from a plurality of strokes, where each of said strokes features a width equal to is substantially a single sinusoidal period and a length that is substantially a multiple of the width.
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A method of testing spatial frequency and contrast sensitivity comprising the steps of:
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Dependencies are inferred from the claim text.