Document Detail

Retinal thickness measurement after phacoemulsification.
MedLine Citation:
PMID:  15210229     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To measure macular thickness using the Retinal Thickness Analyzer (RTA) (Talia Technologies, Ltd.) before and after routine phacoemulsification. SETTING: Ophthalmology Clinic, Ambulatory Care Center, University of North Carolina at Chapel Hill, School of Medicine, and the University of North Carolina Hospitals, Chapel Hill, North Carolina, USA. METHODS: Thirty-five nonconsecutive patients scheduled for phacoemulsification and posterior chamber intraocular lens implantation were recruited. The best corrected visual acuity (BCVA) and macular thickness in the surgical and nonsurgical eyes were measured with the RTA prior to surgery and 1 and 6 weeks after surgery. Wilcoxon signed rank tests were used to evaluate each index of macular thickness--the mean posterior pole, perifoveal, and foveal thicknesses--over the 3 time periods and to compare the indices before surgery in surgical and nonsurgical eyes. Spearman correlations were computed for each index and the BCVA. Significance was assessed at the 5% level. RESULTS: Preoperatively, all indices were higher in surgical [corrected] eyes than in nonsurgical [corrected] eyes. In surgical eyes, all indices decreased from preoperatively to 6 weeks after surgery. In nonsurgical eyes, there was no change. The BCVA in surgical eyes improved from before surgery to 1 week and 6 weeks after surgery. In surgical eyes, there were nonsignificant negative correlations between each index and the BCVA before surgery and 1 and 6 weeks after surgery. In nonsurgical eyes, there were nonsignificant negative correlations between each index and the BCVA preoperatively and 6 weeks after surgery, except for a significant negative correlation for the foveal index at 6 weeks. CONCLUSIONS: Measurements by the RTA indicate that the decrease in macular thickness indices in surgical eyes from before surgery to 6 weeks after routine phacoemulsification is an artifact of imaging the retina through hazy media. Therefore, the results must be interpreted in the context of the clinical situation.
Kenneth L Cohen; Sheel B Patel; Neepa Ray
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cataract and refractive surgery     Volume:  30     ISSN:  0886-3350     ISO Abbreviation:  J Cataract Refract Surg     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-06-22     Completed Date:  2004-08-09     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8604171     Medline TA:  J Cataract Refract Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1501-6     Citation Subset:  IM    
Department of Ophthalmology, University of North Carolina at Chapel Hill, School of Medicine, 5110 Bioinformatics Building, 130 Mason Farm Road, Chapel Hill, NC 27599-7040, USA.
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MeSH Terms
Aged, 80 and over
Body Weights and Measures
Diagnostic Techniques, Ophthalmological
Lens Implantation, Intraocular
Macular Edema / diagnosis*
Middle Aged
Postoperative Complications / diagnosis*
Postoperative Period
Retina / pathology*
Comment In:
J Cataract Refract Surg. 2005 Jul;31(7):1269-70; author reply 1270   [PMID:  16105579 ]
Erratum In:
J Cataract Refract Surg. 2005 Jan;31(1):14

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

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