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Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects
BACKGROUND: During perimetric testing it is well known to wear spectacles. But less is known about to what extent refractive errors affect the response time performing computer-based visual tasks. METHODS: Patients with visual field defects (VFD) (n = 6) and normal control subjects (n = 6) performed...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
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Dove Medical Press
2007
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2704513/ https://www.ncbi.nlm.nih.gov/pubmed/19668499 |
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author | Jobke, Sandra Kasten, Erich Sabel, Bernhard A |
author_facet | Jobke, Sandra Kasten, Erich Sabel, Bernhard A |
author_sort | Jobke, Sandra |
collection | PubMed |
description | BACKGROUND: During perimetric testing it is well known to wear spectacles. But less is known about to what extent refractive errors affect the response time performing computer-based visual tasks. METHODS: Patients with visual field defects (VFD) (n = 6) and normal control subjects (n = 6) performed computer-based high resolution perimetry (HRP) with and without the use of spectacles. We recorded stimulus detection, response times, false hits, and fixation controls as well as contrast sensitivity with and without spectacles. RESULTS: Performance without spectacles resulted in decreased contrast sensitivity of control subjects (41.5%, p < 0.05) and patients with VFD (36.4%, p < 0.05) and slowed reaction times from 436.2 ms to 463.7 ms in patients (p < 0.05) and from 371.3 ms to 402.3 ms in normal subjects (nonsignificant). In patients also reduced stimulus detection from 64.0% to 58.6% (nonsignificant) and increased number of false hits from 1.7 to 2.8% (nonsignificant) occurred. However, the normal subjects showed more false hits with glasses (2.3%) than without (1.0%, nonsignificant). The number of fixation control responses was unaffected. The majority of the subjects felt subjectively better wearing eyeglasses. CONCLUSION: Both in normal subjects and patients with VFD computer-based diagnostic tests should always be performed with eyeglasses to optimize visual performance. |
format | Text |
id | pubmed-2704513 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Dove Medical Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-27045132009-08-10 Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects Jobke, Sandra Kasten, Erich Sabel, Bernhard A Clin Ophthalmol Original Research BACKGROUND: During perimetric testing it is well known to wear spectacles. But less is known about to what extent refractive errors affect the response time performing computer-based visual tasks. METHODS: Patients with visual field defects (VFD) (n = 6) and normal control subjects (n = 6) performed computer-based high resolution perimetry (HRP) with and without the use of spectacles. We recorded stimulus detection, response times, false hits, and fixation controls as well as contrast sensitivity with and without spectacles. RESULTS: Performance without spectacles resulted in decreased contrast sensitivity of control subjects (41.5%, p < 0.05) and patients with VFD (36.4%, p < 0.05) and slowed reaction times from 436.2 ms to 463.7 ms in patients (p < 0.05) and from 371.3 ms to 402.3 ms in normal subjects (nonsignificant). In patients also reduced stimulus detection from 64.0% to 58.6% (nonsignificant) and increased number of false hits from 1.7 to 2.8% (nonsignificant) occurred. However, the normal subjects showed more false hits with glasses (2.3%) than without (1.0%, nonsignificant). The number of fixation control responses was unaffected. The majority of the subjects felt subjectively better wearing eyeglasses. CONCLUSION: Both in normal subjects and patients with VFD computer-based diagnostic tests should always be performed with eyeglasses to optimize visual performance. Dove Medical Press 2007-06 /pmc/articles/PMC2704513/ /pubmed/19668499 Text en © 2007 Dove Medical Press Limited. All rights reserved |
spellingShingle | Original Research Jobke, Sandra Kasten, Erich Sabel, Bernhard A Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title | Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title_full | Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title_fullStr | Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title_full_unstemmed | Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title_short | Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
title_sort | influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2704513/ https://www.ncbi.nlm.nih.gov/pubmed/19668499 |
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