To the Editor.
—Adamsons et al1 provide useful information on how different types and gradation of cataracts correlate with glare and contrast sensitivity. However, I am puzzled by their conclusions that "age and decreased visual acuity account for little of this disability," and "glare and contrast sensitivity results are unrelated to visual acuity." The article describes the mean visual acuity loss in their study population (20/40) as being "minimal," but I would argue that a loss of 50% resolution is actually very significant (ask any patient with central serous chorioretinopathy). Furthermore, when acuity falls to 20/40, contrast sensitivity falls significantly below normal across all spatial frequencies2,3 by a decrement as large as the authors describe in their "corrected" curves. They state that contrast sensitivity results are "corrected for visual acuity," but there is no description of how, although this paradigm could be critical to the results.There is
Marmor MF. Glare and Contrast Sensitivity With Cataracts. Arch Ophthalmol. 1993;111(4):427. doi:10.1001/archopht.1993.01090040017002