Document Detail

Does macular laser alter the refraction in a diabetic with maculopathy? A pilot study.
MedLine Citation:
PMID:  11702968     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To determine whether macular photocoagulation has any effect on refraction in diabetics. METHODS: This was a prospective study of 12 eyes of 12 diabetics with refraction at 2 weeks before and at 4 weeks and 4 months after argon laser. This was combined with a questionnaire survey of attitude among ophthalmologists on prescribing spectacles for diabetics awaiting macular laser. The main outcome measure was the spherical equivalents (SEQ) before and after treatment. RESULTS: Only 36% of ophthalmologists surveyed would prescribe corrective lenses in patients waiting for macular photocoagulation. The median change in magnitude of SEQ at 4-6 weeks post-laser compared to pre-laser was 0.36 D (interquartile range 0.18-0.50 D). The median change in SEQ at 4 months was 0.25 D (interquartile range 0.12-0.56 D). These changes in SEQ from pretreatment values were not statistically significant on Wilcoxon signed-rank test (p = 0.17 and 0.10, respectively). The correlation coefficient between difference and average SEQ was 0.02 (95% CI -0.14 to 0.19, p = 0.75) at 4 weeks and 0.11 (95% CI -0.06 to 0.275, p = 0.17) at 4 months, indicating no tendency for change in refraction with increasing ametropia. CONCLUSION: This pilot study implies that argon laser photocoagulation in diabetic maculopathy does not alter refraction. Prescription of corrective lenses can be performed prior to laser therapy, if required.
K T Sim; L Tong; S A Vernon
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Eye (London, England)     Volume:  15     ISSN:  0950-222X     ISO Abbreviation:  Eye (Lond)     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2001-11-12     Completed Date:  2001-12-11     Revised Date:  2009-11-03    
Medline Journal Info:
Nlm Unique ID:  8703986     Medline TA:  Eye (Lond)     Country:  England    
Other Details:
Languages:  eng     Pagination:  591-4     Citation Subset:  IM    
Department of Ophthalmology University Hospital, Nottingham, UK.
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MeSH Terms
Case-Control Studies
Diabetic Retinopathy / physiopathology,  surgery*
Health Care Surveys
Laser Coagulation / adverse effects*
Middle Aged
Physician's Practice Patterns
Pilot Projects
Prospective Studies
Refraction, Ocular / physiology*
Refractive Errors / etiology*,  physiopathology
Statistics, Nonparametric

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

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