Document Detail

Recovery of phorias following monocular occlusion.
MedLine Citation:
PMID:  8014783     Owner:  NLM     Status:  MEDLINE    
Fourteen nonstrabismic volunteers were monocularly patched for 2 and 24 hours in separate experiments. Horizontal and vertical phorias were measured at 6 m and 30 cm, at 30-second intervals, for at least 30 minutes, following removal of the patch. After 24 hours of monocular occlusion, the initial change from baseline at 6 m ranged from 9.5 prism diopters exo to 7 delta eso and 6.5 delta hyper to 3 delta hypo. At 30 cm, the initial change ranged from 7.5 delta exo to 4 delta eso and 1 delta hyper to 1 delta hypo. In all but three subjects, phorias returned to within 2 delta of baseline by 3 minutes, and in all subjects by 25 minutes. After 2 hours of monocular occlusion, the range of initial change from baseline was similar to 24 hours of occlusion, but all phorias returned to within 2 delta of baseline by 2.5 minutes. Therefore, we suggest that ocular alignment should not be routinely measured within 3 minutes of removing a patch. If patched for 24 hours, a few individuals will require up to 25 minutes for stabilization of their deviation. Further studies might address these effects in patients with subnormal fusion and stereopsis.
J M Holmes; K M Kaz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of pediatric ophthalmology and strabismus     Volume:  31     ISSN:  0191-3913     ISO Abbreviation:  J Pediatr Ophthalmol Strabismus     Publication Date:    1994 Mar-Apr
Date Detail:
Created Date:  1994-07-28     Completed Date:  1994-07-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7901143     Medline TA:  J Pediatr Ophthalmol Strabismus     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  110-3     Citation Subset:  IM    
Department of Ophthalmology, Loyola University Chicago, Maywood, Ill 60153.
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MeSH Terms
Sensory Deprivation*
Strabismus / physiopathology*
Time Factors
Vision, Monocular / physiology*

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