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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1990-8-13
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pubmed:abstractText |
A new technique, the gradient filter test, was developed for evaluating changes in the visual acuity of preverbal children undergoing treatment for amblyopia. The gradient filter test consists of a series of calibrated photographic fog filter and prism lenses. The combined prism-filter lenses are placed in front of the normal fixing eye. The greatest density (fogging value) filter that causes a switch in fixation from the amblyopic to the normal eye is noted. In both normal eyes of 20 nonamblyopic patients and the fellow (non-amblyopic) eyes of 20 amblyopic patients, visual acuity decreased as the density of the prism-filter lens increased. The gradient filter test accurately detected an improvement in visual acuity when compared with optotype measurements in eight patients undergoing occlusion therapy. The gradient filter test is a useful clinical tool that can assess changes in visual acuity in preverbal children who are being treated for amblyopia.
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pubmed:commentsCorrections | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
0002-9394
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
110
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
57-61
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:2368821-Amblyopia,
pubmed-meshheading:2368821-Child,
pubmed-meshheading:2368821-Equipment Design,
pubmed-meshheading:2368821-Filtration,
pubmed-meshheading:2368821-Humans,
pubmed-meshheading:2368821-Reproducibility of Results,
pubmed-meshheading:2368821-Vision Tests,
pubmed-meshheading:2368821-Visual Acuity
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pubmed:year |
1990
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pubmed:articleTitle |
The gradient filter test to assess amblyopia.
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pubmed:affiliation |
Department of Ophthalmology, University of Iowa, Iowa City 52242.
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pubmed:publicationType |
Journal Article,
Comparative Study,
Case Reports
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