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Glare and Contrast Sensitivity With Cataracts-Reply

Glare and Contrast Sensitivity With Cataracts-Reply Abstract In Reply. —We wish to clarify and correct several misunderstandings of our article.Our conclusion that "age and decreased visual acuity account for little of this disability" was based on our findings detailed in the subsections entitled "Glare Tests," "Contrast Sensitivity Tests," and "PSC and Nuclear Opacity Subgroups." In these subsections we described the persistence of the effect of cataract, even after accounting for the effects of age and visual acuity on visual function.We shared Dr Marmor's concern that the glare disability and contrast sensitivity loss affecting cataract patients might be highly correlated with visual acuity loss. That is why we adjusted (but not "corrected") our contrast sensitivity and glare data for acuity differences by using multiple regression techniques, as indicated in the "Data Analysis" section. In other words, even after accounting for the effect of reduced visual acuity, glare and contrast deficits remained.Dr Marmor's statement that a References 1. Marmor MF, Gawande AA. Effect of visual blur on contrast sensitivity . Ophthalmology . 1988;95:139-143.Crossref 2. Smith G. Relation between spherical refractive error and visual acuity . Optom Vis Sci . 1991;68:591-598.Crossref 3. Legge GE, Mullen KT, Woo GC, Cambell FW. Tolerance to visual defocus . J Opt Soc Am . 1987;4:851-863.Crossref 4. Campbell FW, Green DG. Optical and retinal factors affecting visual resolution . J Physiol . 1965;181:576-593. 5. Charman WN. Effect of refractive error in visual tests with sinusoidal gratings . Br J Physiol Optics . 1979;33:10-20. 6. Green DG, Campbell FW. Effect of focus on the visual response to a sinusoidally modulated spatial stimulus . J Opt Soc Am . 1965;55:1154-1157.Crossref 7. Bradley A, Hook J, Haeseker J. A comparison of clinical acuity and contrast sensitivity charts: effect of uncorrected myopia . Ophthalmic Physiol Opt . 1991;11:218-226.Crossref http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Ophthalmology American Medical Association

Glare and Contrast Sensitivity With Cataracts-Reply

Glare and Contrast Sensitivity With Cataracts-Reply

Abstract

Abstract In Reply. —We wish to clarify and correct several misunderstandings of our article.Our conclusion that "age and decreased visual acuity account for little of this disability" was based on our findings detailed in the subsections entitled "Glare Tests," "Contrast Sensitivity Tests," and "PSC and Nuclear Opacity Subgroups." In these subsections we described the persistence of the effect of cataract, even after accounting for the effects of...
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Publisher
American Medical Association
Copyright
Copyright © 1993 American Medical Association. All Rights Reserved.
ISSN
0003-9950
eISSN
1538-3687
DOI
10.1001/archopht.1993.01090040017003
Publisher site
See Article on Publisher Site

Abstract

Abstract In Reply. —We wish to clarify and correct several misunderstandings of our article.Our conclusion that "age and decreased visual acuity account for little of this disability" was based on our findings detailed in the subsections entitled "Glare Tests," "Contrast Sensitivity Tests," and "PSC and Nuclear Opacity Subgroups." In these subsections we described the persistence of the effect of cataract, even after accounting for the effects of age and visual acuity on visual function.We shared Dr Marmor's concern that the glare disability and contrast sensitivity loss affecting cataract patients might be highly correlated with visual acuity loss. That is why we adjusted (but not "corrected") our contrast sensitivity and glare data for acuity differences by using multiple regression techniques, as indicated in the "Data Analysis" section. In other words, even after accounting for the effect of reduced visual acuity, glare and contrast deficits remained.Dr Marmor's statement that a References 1. Marmor MF, Gawande AA. Effect of visual blur on contrast sensitivity . Ophthalmology . 1988;95:139-143.Crossref 2. Smith G. Relation between spherical refractive error and visual acuity . Optom Vis Sci . 1991;68:591-598.Crossref 3. Legge GE, Mullen KT, Woo GC, Cambell FW. Tolerance to visual defocus . J Opt Soc Am . 1987;4:851-863.Crossref 4. Campbell FW, Green DG. Optical and retinal factors affecting visual resolution . J Physiol . 1965;181:576-593. 5. Charman WN. Effect of refractive error in visual tests with sinusoidal gratings . Br J Physiol Optics . 1979;33:10-20. 6. Green DG, Campbell FW. Effect of focus on the visual response to a sinusoidally modulated spatial stimulus . J Opt Soc Am . 1965;55:1154-1157.Crossref 7. Bradley A, Hook J, Haeseker J. A comparison of clinical acuity and contrast sensitivity charts: effect of uncorrected myopia . Ophthalmic Physiol Opt . 1991;11:218-226.Crossref

Journal

Archives of OphthalmologyAmerican Medical Association

Published: Apr 1, 1993

References