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Method for use in diagnosis of glaucoma

  • US 5,065,767 A
  • Filed: 08/25/1989
  • Issued: 11/19/1991
  • Est. Priority Date: 08/26/1988
  • Status: Expired due to Term
First Claim
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1. A method of testing a person to determine the presence of glaucomatous destruction of ganglion cells in a retina of that person, said method comprising the steps of:

  • (a) monocularly presenting the person with a sinusoidal grating pattern having generally elongate striations, the contrast of the pattern being modulated at a frequency in the range of from about 10 Hz to about 50 Hz, the contrast of the grating pattern being such that the person can observe a frequency-doubled grating pattern;

    (b) reducing the contrast of the grating pattern until a contrast value at which the frequency-doubled pattern is no longer observed is attained; and

    (c) comparing said attained contrast value at which the frequency-doubled pattern is no longer observed with the highest contrast value at which the frequency-doubled pattern is no longer observed by persons of normal vision.

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