Is 20/20 vision good enough? Visual acuity differences within the normal range predict contour element detection and integration.

ABSTRACT: Contour integration (CI) combines appropriately aligned and oriented elements into continuous boundaries. Collinear facilitation (CF) occurs when a low-contrast oriented element becomes more visible when flanked by collinear high-contrast elements. Both processes rely at least partly on long-range horizontal connections in early visual cortex, and thus both have been extensively studied to understand visual cortical functioning in aging, development, and clinical disorders. Here, we ask: Can acuity differences within the normal range predict CI or CF? To consider this question, we measured binocular visual acuity and compared subjects with 20/20 vision to those with better-than-20/20 vision (SharpPerceivers) on two tasks. In the CI task, subjects located an integrated shape embedded in var

SUBMITTER: Keane BP 

PROVIDER: S-EPMC4240750 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature