Meridional anisotropy in contrast sensitivity and visual evoked potential in adults with high myopic astigmatism.

ABSTRACT:

Purpose

Astigmatism can lead to meridional amblyopia, an orientation-specific visual deficit. This study investigated the effects of astigmatism on meridional anisotropy in contrast sensitivity (CS) and steady-state visual evoked potential (ssVEP) across a range of spatial frequencies.

Methods

Thirty-two young adults with a best-corrected distance visual acuity of logMAR 0 or better were categorized into two groups: highly astigmatic (HAS, n = 16) with spherical-equivalent error (SE) ≥ -6.00 D and a cylindrical error (Cyl) ≥ 2.00 DC, and non-astigmatic (NAS, n = 16) with SE ≥ -6.00 D but Cyl ≤ 0.50 DC. We assessed CS using a spatial four-alternative forced-choice procedure and recorded ssVEP at spatial frequencies ranging from 0.6 to 12 cycles per degree (cpd)

SUBMITTER: Wu SSA 

PROVIDER: S-EPMC11754223 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature