Document Detail

Object perception by visually impaired people at different light levels.
MedLine Citation:
PMID:  7839605     Owner:  NLM     Status:  MEDLINE    
We investigated the relationship between the illumination level and the ability of visually impaired subjects to detect and recognize objects in a realistic visual environment. Subjects often continued to show substantial improvement at light levels where normal subjects have reached maximum performance. Integrated contrast sensitivity, a summary measure for the contrast sensitivity function, was better at predicting performance than either visual acuity or peak contrast sensitivity. However, when combined, the latter two predicted performance as well as the former. We conclude that when we try to find the best illumination for orientation and day-to-day activities we should optimize it for both visual acuity and contrast sensitivity.
F W Cornelissen; A Bootsma; A C Kooijman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  35     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1995 Jan 
Date Detail:
Created Date:  1995-02-24     Completed Date:  1995-02-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  161-8     Citation Subset:  IM; S    
Laboratory for Experimental Ophthalmology (LEO), University of Groningen, The Netherlands.
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MeSH Terms
Contrast Sensitivity / physiology
Eye Diseases / physiopathology
Vision Disorders / physiopathology*
Visual Acuity / physiology
Visual Perception / physiology*

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