Image luminance changes contrast sensitivity in visual cortex.

ABSTRACT: Accurate measures of contrast sensitivity are important for evaluating visual disease progression and for navigation safety. Previous measures suggested that cortical contrast sensitivity was constant across widely different luminance ranges experienced indoors and outdoors. Against this notion, here, we show that luminance range changes contrast sensitivity in both cat and human cortex, and the changes are different for dark and light stimuli. As luminance range increases, contrast sensitivity increases more within cortical pathways signaling lights than those signaling darks. Conversely, when the luminance range is constant, light-dark differences in contrast sensitivity remain relatively constant even if background luminance changes. We show that a Naka-Rushton function modified to incl

SUBMITTER: Rahimi-Nasrabadi H 

PROVIDER: S-EPMC7886026 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature