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Perspective: Visual Acuity—Keeping It Clear

Bailey, Ian L.*

doi: 10.1097/OPX.0b013e318269926f
Feature Perspective on Line

ABSTRACT: Research and clinical papers in the ophthalmic literature commonly report visual acuity data. There is considerable variation in the way visual acuity measurements are expressed, and frequently, the charts and the procedures used for the visual acuity testing are inadequately described. Materials and methods can significantly affect visual acuity scores. Contributions to the scientific and professional literature should provide enough detail about their methodologies to allow others to replicate their studies. Here we call for authors and clinicians to be more careful about defining their term, to specifically identify their testing materials, and to give detailed descriptions of their methods of testing.


School of Optometry, University of California at Berkeley, Berkeley, California.

Received May 15, 2012; accepted May 19, 2012.

Ian L. Bailey School of Optometry University of California, Berkeley 415 Minor Hall Berkeley, California 94720-2020 e-mail:

© 2012 American Academy of Optometry