Change in capsulorhexis size with four foldable loop-haptic lenses over 6 months.

Details

Serval ID
serval:BIB_8626
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Change in capsulorhexis size with four foldable loop-haptic lenses over 6 months.
Journal
Journal of Cataract and Refractive Surgery
Author(s)
Sickenberg M., Gonvers M., van Melle G.
ISSN
0886-3350
Publication state
Published
Issued date
1998
Volume
24
Number
7
Pages
925-930
Language
english
Abstract
PURPOSE: To compare the change in continuous curvilinear capsulorhexis (CCC) size after implantation of four types of three-piece foldable intraocular lenses (IOLs) and determine whether initial CCC size and IOL characteristics play a role in the change. METHODS: This study comprised 133 eyes that had phacoemulsification and in-the-bag implantation of one of four types of foldable IOLs: Alcon AcrySof MA30BA (n = 36); lovision 127 (n = 29); Mentor ORC MemoryLens (n = 39); Allergan PhacoFlex II (n = 29). Photographs of the CCCs were taken with a digital retinograph 1 day and 6 months after surgery. Using image-analysis software, the CCC surface was measured and changes between 1 week and 6 months were evaluated. Characteristics of the IOLs including overall diameter, optic thickness, and haptic centrifugal force were measured with micrometric tools. RESULTS: The median change in CCC surface size at 6 months was +5.5% in the lovision group, indicating a slight enlargement. This finding was significantly different from that in the other three IOL groups (P < .0001), which had a tendency toward CCC contraction. Median change in CCC size was -2.3% in the MemoryLens group, -2.8% in the AcrySof group, and -6% in the PhacoFlex group. The MemoryLens was the most predictive IOL, with the smallest standard deviation; it was the only group in which no patient developed CCC contraction of more than 10%. Although the lovision and PhacoFlex IOLs have common physical characteristics except for optic thickness (lovision 30% thicker), the CCCs in the lovision group were significantly more stable (P < .0001). Results indicate that the high centrifugal haptic force associated with acrylate/methacrylate polymer optics of the AcrySof and MemoryLens IOLs may prevent CCC contraction of greater than 10% in 97.4% of cases. CONCLUSION: Although there were statistically significant differences, patients in all four three-piece foldable IOL groups had good CCC stability. However, the more stable and predictable CCCs were in the IOL groups that had the strongest centrifugal haptic force and an acrylate/methacrylate polymer optic (AcrySof and MemoryLens).
Keywords
Acrylic Resins, Aged, Capsulorhexis, Follow-Up Studies, Humans, Lens Capsule, Crystalline/pathology, Lens Implantation, Intraocular/adverse effects, Lenses, Intraocular, Middle Aged, Phacoemulsification, Postoperative Complications/pathology, Postoperative Complications/prevention &amp, control, Prospective Studies, Prosthesis Design
Pubmed
Web of science
Create date
19/11/2007 12:46
Last modification date
20/08/2019 14:45
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