Gradiate: A radial sweep approach to measuring detailed contrast sensitivity functions from eye movements.

ABSTRACT: The contrast sensitivity function (CSF) is an informative measure of visual health, but the practical difficulty of measuring it has impeded detailed analyses of its relationship to different visual disorders. Furthermore, most existing tasks cannot be used in populations with cognitive impairment. We analyzed detailed CSFs measured with a nonverbal procedure called "Gradiate," which efficiently infers visibility from eye movements and manipulates stimulus appearance in real time. Sixty observers of varying age (38 with refractive error) were presented with moving stimuli. Stimulus spatial frequency and contrast advanced along 15 radial sweeps through CSF space in response to stimulus-congruent eye movements. A point on the CSF was recorded when tracking ceased. Gradiate CSFs were reliable

SUBMITTER: Mooney SWJ 

PROVIDER: S-EPMC7774112 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature