Document Detail

Eccentric correction for off-axis vision in central visual field loss.
MedLine Citation:
PMID:  12858089     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Subjects with absolute central visual field loss use eccentric fixation and magnifying devices to utilize their residual vision. This preliminary study investigated the importance of an accurate eccentric correction of off-axis refractive errors to optimize the residual visual function for these subjects. METHODS: Photorefraction using the PowerRefractor instrument was used to evaluate the ametropia in eccentric fixation angles. Methods were adapted for measuring visual acuity outside the macula using filtered optotypes from high-pass resolution perimetry. Optical corrections were implemented, and the visual function of subjects with central visual field loss was measured with and without eccentric correction. RESULTS: Of the seven cases reported, five experienced an improvement in visual function in their preferred retinal locus with eccentric refraction. CONCLUSIONS: The main result was that optical correction for better image quality on the peripheral retina is important for the vision of subjects with central visual field loss, objectively as well as subjectively.
Jörgen Gustafsson; Peter Unsbo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Optometry and vision science : official publication of the American Academy of Optometry     Volume:  80     ISSN:  1040-5488     ISO Abbreviation:  Optom Vis Sci     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-07-14     Completed Date:  2003-09-03     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8904931     Medline TA:  Optom Vis Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  535-41     Citation Subset:  IM    
Department of Design Sciences, Lund University, Sweden.
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MeSH Terms
Contrast Sensitivity
Fixation, Ocular
Middle Aged
Refractive Errors / complications*,  diagnosis,  therapy*
Treatment Outcome
Vision Disorders / complications*,  physiopathology*
Vision, Ocular*
Visual Acuity
Visual Fields*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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