The Effect of Manipulation of Corneal Incision on Astigmatism During the Cataract Surgery.
10.3341/jkos.2010.51.4.510
- Author:
Sohee JEON
1
;
Kyung Sun NA
;
Man Soo KIM
Author Information
1. Department of Ophthalmology and Visual Science, The Catholic University of Korea College of Medicine, Seoul, Korea. mskim@catholic.ac.kr
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Cataract surgery;
Corneal astigmatism;
Incision size
- MeSH:
Astigmatism;
Cataract;
Corneal Topography;
Eye;
Humans;
Lenses, Intraocular;
Prospective Studies;
Visual Acuity
- From:Journal of the Korean Ophthalmological Society
2010;51(4):510-515
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the effect of clear corneal incisional size on astigmatism during cataract surgery. METHODS: Randomized prospective study of 78 patients (108 eyes) who had received cataract surgery for a corneal astigmatism over against-the-rule (ATR) 1.0 Diopter (D) was performed. The eyes were checked by corneal topography and autorefractor preoperatively and one week, one month, two months, and six months postoperative. Group 1 included patients who received an inserted foldable intraocular lens (IOL) through a 2.8 mm incision, and Group 2 included patients who underwent IOL implantation through a corneal incision enlarged to 4 mm. RESULTS: Postoperative visual acuity showed a better visual acuity in Group 2 at both one week postoperatively (0.598+/-0.352 vs., 0.713+/-0.345, for Groups 1 and 2, respectively, p=0.046) and one month postoperatively (0.604+/-0.237 vs., 0.791+/-0.242, respectively, p=.043). There were no statistically significant differences between the groups after two and six months (p=.135, .087). Postoperative astigmatism measured by corneal topopgraphy showed 1.62+/-0.44D and, 0.94+/-0.30D for groups 1 and 2 respectively, (P=.045) at 2 months, and 1.73+/-0.45 D and, 0.92+/-0.34 D (P=.042) at six months. These results showed a statistically significant amount of residual astigmatism in Group 2. Autorefractor measurements showed similar results. There were no complications, such as wound leakage, resulting from the increased incision size. CONCLUSIONS: Widening of the incision during cataract surgery can reduce corneal astigmatism without significant complications.
