Abstract

Retinal diseases decrease the sensitivity of the visual system. A variety of psychophysical techniques have been employed to test competing hypotheses as to the site and mechanism of disease related sensitivity loss. Although there has been considerable analysis of increment thresholds on flashed backgrounds^1,2,3,4, surprisingly little theoretical use has been made of standard increment threshold (tvi) curves^5,6. Here we propose a conceptual framework for using (tvi) data to test whether the primary disease defect is at the level of the receptors.

© 1988 Optical Society of America