Glaucoma testing using non-linear systems identification techniq

Details Glaucoma testing using non-linear systems identification techniq Glaucoma testing using non-linear systems identification techniq

1993-03-01

1996-07-23

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Methods of use

351205, 351221, 128745, A61B 310, A61B 504

Patent

active

055394825

ABSTRACT:
A diagnostic test for glaucoma, which can detect the early stages of this disease, uses a pattern electroretinogram of a subject to assess any reduction of the density of M.sub.y ganglion cells in a part of the subject's retina. The visual field of the eye of the subject is divided into a number of zones, and a respective visual stimulus signal is applied to each zone. The visual stimulus signals are generated in accordance with data obtained from determinations of the critical spatial frequency (Nyquist frequency) of persons with normal vision, obtained from observations of the "aliasing" phenomenon. Typical visual stimulus signals are grating patterns, with the contrast of the signal applied to each zone modulated with a different temporal frequency in the range of from 10 Hz to 45 Hz. Any differences between the electroretinogram response component for an individual zone and the expected response component for that zone indicates a change in the M.sub.y ganglion cell function in that zone, attributable to the effect of glaucoma.

REFERENCES:
patent: 4634243 (1987-01-01), Massof et al.
patent: 4822162 (1989-04-01), Richardson et al.
patent: 5065767 (1991-11-01), Maddess
patent: 5176147 (1993-01-01), Bodis-Wollner
patent: 5233373 (1993-08-01), Peters et al.

Affiliated with

Also associated with

Rating

Glaucoma testing using non-linear systems identification techniq does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Glaucoma testing using non-linear systems identification techniq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glaucoma testing using non-linear systems identification techniq will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-716856