Correlations between visual acuity, grating acuity and contrast sensitivity in amblyopia

Abstract

Abstract In order to obtain a large set of data to analyse correlations between different measures of vision in amblyopia, we pooled the information on all 114 amblyopic patients contained in our earlier series (49 strabismic, 28 anisometropic and 37 combined strabismic/anisometropic children).It was found that strabismus influenced visual acuity more than did anisometropia, but anisometropia influenced contrast sensitivity more than strabismus.The correlation coefficients between visual acuity and contrast sensitivity and between grating acuity and contrast sensitivity were lowest at 1 c/deg and highest at 13 c/deg. The correlation between grating acuity and contrast sensitivity was slightly better than between visual acuity and contrast sensitivity. The highest correlation coefficients were found in cases of combined strabismic/anisometropic amblyopia and the lowest in anisometropic amblyopia, which was not expected on the basis of some earlier reports in the literature. The best correlation between visual acuity and grating acuity was in the cases of combined amblyopia.