Document Detail

Prophylactic treatment of seasonal affective disorder (SAD) by using light visors: bright white or infrared light?
MedLine Citation:
PMID:  10418699     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Thirty-eight patients with SAD participated in a light visor study addressing two questions. 1. Can the development of a depressive episode be prevented by daily exposure to bright light started before symptom onset in early fall and continued throughout the winter? 2. Does the light have to be visible in order to have beneficial effects? METHODS: Three groups participated in the study: I (n = 14) received bright white light (2500 lux); II, (n = 15) received infrared light (0.18 lux); III (n = 9, control group) did not receive any light treatment at all. RESULTS: Infrared light is just as effective as bright white light. Both are more effective than the control condition. CONCLUSIONS: Light visors can be effectively used to prevent the development of SAD. The fact that exposure to infrared light was as effective as exposure to bright white light questions the specific role of visible light in the treatment of SAD.
Y Meesters; D G Beersma; A L Bouhuys; R H van den Hoofdakker
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Biological psychiatry     Volume:  46     ISSN:  0006-3223     ISO Abbreviation:  Biol. Psychiatry     Publication Date:  1999 Jul 
Date Detail:
Created Date:  1999-10-25     Completed Date:  1999-10-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0213264     Medline TA:  Biol Psychiatry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  239-46     Citation Subset:  IM    
Academic Hospital Groningen, Department of Biological Psychiatry, The Netherlands.
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MeSH Terms
Equipment Design
Infrared Rays*
Middle Aged
Phototherapy / instrumentation*
Preventive Health Services / methods
Seasonal Affective Disorder / prevention & control*

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

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