Abstract

We are studying detection mechanisms to generate and evaluate models of postreceptoral channels in extrafoveal human vision. Stiles and others have described spectral (pi) mechanisms that mediate increment detection in prescribed conditions in the fovea. These mechanisms are characterized in part by their test-spectral-sensitivity (TSS) functions. We have begun to measure TSS functions at 7° eccentricity (nasal retina) as the spectral, spatial, and temporal characteristics of the test and background stimuli are varied to characterize the full range of detection mechanisms that operate in the perifoveal retina.

© 1987 Optical Society of America