The Amblyopia Treatment Study Visual Acuity Testing Protocol

Abstract

QUANTIFYING visual acuity is an integral part of the clinical management of many eye diseases in children. Visual acuity is also a desirable outcome measure in clinical trials that address pediatric eye disease. In contrast to testing visual acuity in adults, in which the Early Treatment Diabetic Retinopathy Study (ETDRS) testing protocol is the accepted standard for clinical research,^1,2 there is no such standard for testing visual acuity in children.³