Patent ID: 6835179
Filing Date: 2004-12-28
Classification: A61B

Abstract:
A method of presenting visible testing stimuli to a human eye at a perimeter testing surface, the human eye being subject to natural changes in position that result in natural changes in gaze and fixation, the method comprising the steps of:(a) first, determining a first point of fixation of the human eye by capturing a first image of the human eye, digitizing the first image and processing the image with a computer to locate the first point of fixation; (b) thereafter, presenting a first testing stimulus at a location measured relative to the first point of fixation on a coordinate system having the first point of fixation as its reference point; (c) recording a response to the first testing stimulus; (d) next, determining a second point of fixation of the human eye by capturing a second image of the human eye, digitizing the second image and processing the image with a computer to locate the second point of fixation; (e) presenting a second testing stimulus at a location measured relative to the second point of fixation on the coordinate system now having the second point of fixation as its reference point; (f) recording a response to the second testing stimulus and (g) repeating steps (d), (e) and (f) for additional points of fixation, testing stimuli and responses to testing stimuli.