Characterization and correction of macular distortion
First Claim
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1. A quantitative diagnostic method used to correct a patient'"'"'s vision degraded by Age Related Macular Degeneration (AMD), comprising, one eye at a time:
- (A) preparing, on a computer screen, a standard Amsler Grid (AG) having a plurality of horizontal lines, a plurality of vertical lines, and a plurality of intersection points;
(B) highlighting the center point (CP) of the standard AG;
(C) selecting one or more of the horizontal lines and one or more of the vertical lines, and one or more of the intersection points with the selected lines;
(D) highlighting, one at a time, these selected lines, the selected intersection points, and the boundary points of the selected lines, and designating the intersection points as original (perfect AG) intersection points;
(E) straightening the highlighted lines according to the patient'"'"'s perception, using a computer input device, while the patient'"'"'s gaze is fixed on the highlighted CP, while the patient views the highlighted intersection points, and while the patient uses the highlighted boundary points as peripheral cues, to form final intersection points;
(F) computing discrete displacement vectors between all the original (perfect AG) and corresponding final intersection points; and
(G) applying the displacement vectors to a device to correct the patient'"'"'s vision.
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Abstract
A method and apparatus for correcting vision in macular degeneration patients. Following a diagnostic procedure which has been successfully tested to determine the factors needed to correct the vision of a patient with macular degeneration, the present invention describes a prototype correcting procedure and device using a computer program and display device. Through manipulation of a grid and quantitative analysis of the manipulations, the extent and correction factors needed to correct the vision of a macular degeneration patient are discussed.
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Citations
9 Claims
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1. A quantitative diagnostic method used to correct a patient'"'"'s vision degraded by Age Related Macular Degeneration (AMD), comprising, one eye at a time:
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(A) preparing, on a computer screen, a standard Amsler Grid (AG) having a plurality of horizontal lines, a plurality of vertical lines, and a plurality of intersection points; (B) highlighting the center point (CP) of the standard AG; (C) selecting one or more of the horizontal lines and one or more of the vertical lines, and one or more of the intersection points with the selected lines; (D) highlighting, one at a time, these selected lines, the selected intersection points, and the boundary points of the selected lines, and designating the intersection points as original (perfect AG) intersection points; (E) straightening the highlighted lines according to the patient'"'"'s perception, using a computer input device, while the patient'"'"'s gaze is fixed on the highlighted CP, while the patient views the highlighted intersection points, and while the patient uses the highlighted boundary points as peripheral cues, to form final intersection points; (F) computing discrete displacement vectors between all the original (perfect AG) and corresponding final intersection points; and (G) applying the displacement vectors to a device to correct the patient'"'"'s vision. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. A device for quantifying a patient'"'"'s vision impaired by macular degeneration, comprising:
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a computer; and an input device, coupled to the computer, wherein; the computer displays; a standard Amsler Grid (AG) having a plurality of horizontal lines, a plurality of vertical lines, and a plurality of intersection points and the center point (CP) of the standard AG, on a monitor; the input device is configured to; display the center point (CP) of the standard AG with a visual cue; select one or more of the horizontal lines, one or more of the vertical lines, and one or more of the intersection points with the selected lines, wherein the intersection points are designated as original (perfect AG) intersection points, the selected intersection points, selected lines, and boundary points of the selected lines, and the CP are all displayed with visual cues on the monitor in response to the selection, and the visual cues highlight and differentiate the selected points, the selected lines, and the CP, from all non-selected points and non-selected lines; and straighten the selected line displayed with the visual cues according to the patient'"'"'s perception, to form final intersection points, while the CP and the boundary points are displayed to keep the patient'"'"'s eye centered, provide peripheral cues, and straighten the interior of the AG such that the lines appear straight and pass through the appropriate boundary points according to the patient'"'"'s perception; the computer computes discrete displacement vectors between all the original (perfect AG) and corresponding final intersection points; and the computer quantifies the patient'"'"'s vision based on the displacement vectors.
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Specification