Age-related decline in motion contrast sensitivity due to lower absorption rate of cones and calculation efficiency.

ABSTRACT: Motion perception is affected by healthy aging, which impairs the ability of older adults to perform some daily activities such as driving. The current study investigated the underlying causes of age-related motion contrast sensitivity losses by using an equivalent noise paradigm to decompose motion contrast sensitivity into calculation efficiency, the temporal modulation transfer function (i.e., temporal blur) and 3 sources of internal noise: stochastic absorption of photons by photoreceptors (i.e., photon noise), neural noise occurring at the retinal level (i.e., early noise) and at the cortical level (i.e., late noise). These sources of internal noise can be disentangled because there impacts on motion contrast sensitivity vary differently as a function of luminance intensity. The impac

SUBMITTER: Braham Chaouche A 

PROVIDER: S-EPMC7536415 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature