Review of the substantial literature reveals that the importance of performance-based measures of visual function is becoming increasingly recognized. Alone, or in combination with other assessment modalities, they have been shown to provide a reliable and valid means of evaluating visual ability. Further, they have been demonstrated to predict outcomes better than self-report or clinical measures alone.
Glaucoma Research Center, William and Anna Goldberg Glaucoma Service, Wills Eye Institute, Philadelphia, Pennsylvania, USA
Reprint address: Kevin J. Warrian, MD, Ivey Eye Institute, Department of Ophthalmology, University of Western Ontario, 268 Grosvenor St., London ON N6A 4V2, Canada.
The authors reported no proprietary or commercial interest in any product mentioned or concept discussed in this article.
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