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The change of corneal curvatures after micro-trabeculectomy surgery among glaucoma patients |
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| รหัสดีโอไอ | |
| Creator | Pham Thi Thuy Tien MD1, Huynh Luong Minh MD2,Nguyen Thao Huong MD1, Tran Anh Tuan MD3, Tran Minh Tuan MD2 |
| Title | The change of corneal curvatures after micro-trabeculectomy surgery among glaucoma patients |
| Publisher | AECOM Foundation |
| Publication Year | 2560 |
| Journal Title | Eye South East Asia |
| Journal Vol. | 12 |
| Journal No. | 2 |
| Page no. | 36-45 |
| Keyword | micro-trabeculectomy, surgically induced astigmatism, keratometer |
| ISSN | 2586-8349 |
| Abstract | Background: There has been few reports on analysing astigmatism after standard trabeculectomy and only one study about micro-trabeculectomy by Vernon et al. in 1991; there were none which compared 2 groups in one individual study.Objective: To compare the postoperative changes of corneal curvature (surgically induced astigmatism SIA) between two different glaucoma surgery techniques: microtrabeculectomy and standard trabeculectomy.Methods: A randomized clinical trial was done including 81 eyes (81 patients) who were randomized selected to perform either standard trabeculectomy (4x4 mm scleral flap) or micro-trabeculectomy (2x2 mm scleral flap), both with antifibrotic 5- Fluorouracil. Patients' pre- and postoperative detailed ophthalmologic examinations were documented and topographic keratometric values (flattest K, steepest K) were noted. Vector analysis was performed on the data using a computerized method to calculate the SIA for each eye at 1st day, 4th, 12th, 24th week follow-up postoperatively. Results: The mean SIA power reduced gradually from 1.89 Diopter to 1.30, 0.95, 0.73, 0.60 Diopter in the standard group and from 1.03 Diopter to 0.92, 0.83, 0.74, and 0.73 Diopter in the micro group at 1 day, 1st week, 4th week, 12th week and 24th week follow-up respectively. The SIA power values in standard group were significantly higher than the values in micro group at 1st day and 1st week postoperatively. There was no correlation between SIA and IOP in standard and micro-trabeculectomy group.Conclusion: Micro-trabeculectomy is an invasive filtration procedure which caused minimally statistically significant induced astigmatism. |
