Reply

We thank DR Hirneiss for his interest in our study. We agree that the absolute value of the difference in correlation coefficients was small when comparing visual field (VF) scores with the total Assessment of Disability Related to Vision score and the 25-item National Eye Institute Visual Function Questionnaire score in the better and worse eye. However, we find it noteworthy that after adjusting for age, race, and visual acuity, the VF score in the better eye was correlated more highly with visual functioning across all VF staging systems, Assessment of Disability Related to Vision subtest scores, and 25-item National Eye Institute Visual Function Questionnaire scores. The findings of Gothwal and associates corroborate ours with regard to the ability of mean defect (MD) in the better eye to predict functional ability.