Assessment of contrast sensitivity of patients with macular disease using reduced contrast near visual acuity charts

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Show simple item record Greeves, AL en Cole, BL en Jacobs, Robert en 2013-04-22T04:46:22Z en 1988 en
dc.identifier.citation Ophthalmic and Physiological Optics 8(4):371-377 1988 en
dc.identifier.issn 0275-5408 en
dc.identifier.uri en
dc.description.abstract A set of near Bailey-Lovie logMAR letter charts that varied in contrast from 0.40 dB (C = 0.95) to 58.0 dB (C=0.001) were used to measure the middle and high spatial frequency range of the contrast sensitivity function (CSF) of 15 subjects with age-related maculopathy (ARM) and 15 age-matched normal subjects. The letter charts were shown to have good test-retest reliability. Compared with measures made using CRT generated square wave gratings of variable contrast and spatial frequency they were also shown to provide a valid measure of CSF in the mid to high spatial frequency range. The 20.0 dB letter chart alone was shown to be a good screening device for macular disease. The letter charts do not provide a measure of the peak of the CSF and a supplementary test of contrast sensitivity is needed to quantify contrast sensitivity at a low spatial frequency. Three measures are proposed as necessary to document foveal visual capability of patients with macular disease: distance logMAR visual acuity to measure high spatial frequency resolution, visual acuity with letter charts of 20 dB contrast to assess mid spatial frequency resolution; and contrast sensitivity for the detection of an edge to estimate contrast sensitivity for larger objects. en
dc.description.uri en
dc.relation.ispartofseries Ophthalmic and Physiological Optics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.title Assessment of contrast sensitivity of patients with macular disease using reduced contrast near visual acuity charts en
dc.type Journal Article en
dc.identifier.doi 10.1111/j.1475-1313.1988.tb01171.x en
pubs.issue 4 en
pubs.begin-page 371 en
pubs.volume 8 en
dc.identifier.pmid 3253627 en
pubs.end-page 377 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 82021 en Medical and Health Sciences en Optometry and Vision Science en
dc.identifier.eissn 1475-1313 en
dc.identifier.pii 0275-5408(88)90003-8 en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 3253627 en

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