Abstract

Multi-flash Campimetry, a computer implemented, clinical psychophysical technique, can be useful for monitoring the residual vision of patients suffering from a variety of degenerative disorders such as multiple sclerosis (1-3), glaucoma (4), and macular degeneration (5). In its present form the methodology includes the presentation of 120 points of light arranged in 6 concentric circles such that the diameter of the largest circle subtends 40 deg. of visual angle at a viewing distance of 57 cm. A computer randomly selects one of these points, flickers it at 5 Hz, and progressively decreases the duty cycle (the proportion of a flicker cycle that is lit), beginning at 100%, in steps of no more than 2% until the flicker is detected. The form of flicker employed by the technique is of the classical variety in which a stimulus of constant luminance is turned on and off (i.e., 100% depth of modulation).

© 1986 Optical Society of America