Astigmatic Blur in Partial Visual Field Exposure Induces Astigmatism Compensation in Developing Chick Eyes.

ABSTRACT:

Purpose

To determine whether localized retinal exposure to astigmatic blur is sufficient to drive compensatory changes in refractive and corneal astigmatism in developing chick eyes.

Methods

One hundred and thirty-six chicks were randomly assigned to nine groups combining three visual field conditions (full, horizontal, or vertical) and three lens treatments: with-the-rule (WTR) astigmatism (+2.00/-4.00 × 90), against-the-rule (ATR) astigmatism (+2.00/-4.00 × 180), or control (plano lens). Objective refraction and A-scan ultrasonography were measured at baseline (post-hatch day 5) and after 7 days of lens treatment, at which time corneal topography was also assessed. Data were analyzed using interocular differences (treated right eye minus untreated left eye) with two-way AN

SUBMITTER: Ayerakwah PA 

PROVIDER: S-EPMC12574736 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature