Abstract | PURPOSE: SETTING: Ophthalmic Research Center and Department of Ophthalmology, Labbafinejad Medical Center, Shahid Beheshti Medical University, Tehran, Iran. DESIGN: Randomized clinical trial. METHODS: Eyes scheduled for cataract extraction were randomly assigned stop-and-chop phacoemulsification with the phaco tip in the conventional bevel-up position or with the phaco tip in the bevel-down position. During surgery, the effective phacoemulsification time (EPT) was recorded. Preoperative endothelial cell parameters were compared with measurements taken 3 months postoperatively. RESULTS: Each group comprised 30 eyes (30 patients). There were no statistically significant differences in age, sex, anterior chamber depth, axial length, or EPT between the 2 groups. The mean preoperative endothelial cell density (ECD) was 2544 cells/mm(2) ± 64 (SD) in the bevel-up group and 2471 ± 59 cells/mm(2) in the bevel-down group (P=.610). Postoperatively, both groups had a significant decrease in ECD. The mean endothelial cell loss was 5.9% in the bevel-up group and 13.6% in the bevel-down group (P=.012). The percentage of hexagonal cells and coefficient of variation in cell size were not different between the 2 groups preoperatively or postoperatively; however, after surgery, there was a significant decrease in the percentage of hexagonal cells in both groups. CONCLUSION: FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
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Authors | Amir Faramarzi, Mohammad Ali Javadi, Farid Karimian, Mohammad Reza Jafarinasab, Alireza Baradaran-Rafii, Fariba Jafari, Mehdi Yaseri |
Journal | Journal of cataract and refractive surgery
(J Cataract Refract Surg)
Vol. 37
Issue 11
Pg. 1971-6
(Nov 2011)
ISSN: 1873-4502 [Electronic] United States |
PMID | 21940143
(Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2011 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved. |
Topics |
- Aged
- Cell Count
- Corneal Endothelial Cell Loss
(etiology, pathology)
- Endothelium, Corneal
(pathology)
- Female
- Humans
- Intraocular Pressure
- Lens Implantation, Intraocular
- Male
- Phacoemulsification
(adverse effects, instrumentation, methods)
- Postoperative Complications
- Prospective Studies
- Tonometry, Ocular
- Visual Acuity
(physiology)
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