Document Detail

Effect of a closed foldable equator ring on capsular bag shrinkage in cataract surgery.
MedLine Citation:
PMID:  17010856     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate the effect of a closed foldable equator ring (CFER) versus a conventional capsular tension ring (CTR) on capsular bag shrinkage. SETTING: Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany. METHODS: In this prospective study, 70 eyes of 70 patients were randomized to 2 groups using a 1:1 block scheme. After uneventful cataract surgery, a capsular measuring ring was implanted in all eyes to measure the capsular bag diameter in vivo. In Group 1, a CTR was implanted in the capsular bag. In Group 2, a CFER was inserted. Biometric characteristics such as axial length and the horizontal and vertical corneal radii were measured preoperatively. The capsular bag diameter and capsulorhexis diameter were measured intraoperatively and 2 or 3 days as well as 1 and 3 months postoperatively. RESULTS: There were no statistically significant or clinically relevant between-group differences in covariants such as axial length, vertical and horizontal corneal radii, and capsulorhexis diameter. Eyes with the CTR had slight but statistically significant capsular bag shrinkage from a median of 10.4 to a median of 10.2 mm after 3 months (P<.001). Eyes with the CFER also had slight but statistically significant capsular bag shrinkage from a median of 10.3 to a median of 10.2 mm 3 months postoperatively (P = .021). At baseline, the CTR group had a larger capsular bag diameter, but there were no statistically significant differences between the groups at the 3-month follow-up (P = .669). CONCLUSIONS: No clinically relevant capsular bag shrinkage was observed after implantation of a CFER or a CTR. The expected capsular bag shrinkage was the same in both groups.
Sabine Kurz; Frank Krummenauer; Carolin Dumbach; Norbert Pfeiffer; H Burkhard Dick
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of cataract and refractive surgery     Volume:  32     ISSN:  0886-3350     ISO Abbreviation:  J Cataract Refract Surg     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-02     Completed Date:  2006-11-09     Revised Date:  2007-08-27    
Medline Journal Info:
Nlm Unique ID:  8604171     Medline TA:  J Cataract Refract Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1615-20     Citation Subset:  IM    
Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany.
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MeSH Terms
Intraoperative Complications
Lens Capsule, Crystalline / surgery*
Lens Implantation, Intraocular / methods*
Phacoemulsification / methods*
Polymethyl Methacrylate
Postoperative Complications
Prospective Studies
Prostheses and Implants*
Prosthesis Implantation*
Reg. No./Substance:
0/Methacrylates; 80-62-6/Methylmethacrylate; 868-77-9/hydroxyethyl methacrylate; 9011-14-7/Polymethyl Methacrylate
Comment In:
J Cataract Refract Surg. 2007 Jul;33(7):1144-5   [PMID:  17586364 ]

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

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