J Korean Ophthalmol Soc > Volume 55(10); 2014 > Article
Journal of the Korean Ophthalmological Society 2014;55(10):1470-1475.
DOI: https://doi.org/10.3341/jkos.2014.55.10.1470    Published online October 15, 2014.
The Comparison of Astigmatic Outcomes after Cataract Surgery of Inferior versus Superior Clear Corneal Incision.
Jong Kyung Na, Man Soo Kim
Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea. mskim@catholic.ac.kr
하측 및 상측 투명각막절개창을 이용한 백내장 수술 후 난시 변화 비교
나종경⋅김만수
Department of Ophthalmology and Visual Science, Seoul St. Mary’s Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea
Abstract
PURPOSE
To analyze the difference in astigmatism and the mean change in total astigmatism between inferior clear corneal incision and superior clear corneal incision following cataract surgery in surgically-induced astigmatism (SIA). METHODS: Fifty-five eyes of 55 patients with with-the-rule astigmatism >0.5 diopters were evaluated. Patients were divided into two groups according to incision location (Group 1, 26 eyes with an inferior incision; Group 2, 29 eyes with a superior incision). Patients were evaluatied one month postoperatively. Uncorrected visual acuity (UCVA, log MAR), best-corrected visual acuity (BCVA, log MAR), SIA and mean change in corneal astigmatism were measured in both groups. RESULTS: One month postoperatively, mean UCVA was 0.15 +/- 0.17 log MAR in Group 1 and 0.23 +/- 0.24 log MAR in Group 2 (p = 0.253). Mean BCVA was 0.08 +/- 0.13 and 0.08 +/- 0.12 log MAR in Groups 1 and 2, respectively (p = 0.926). The SIA was 0.50 +/- 0.17 diopter and 0.57 +/- 0.34 diopter (p = 0.253) and mean change in total astigmatism was 0.50 +/- 0.96 diopter and 0.38 +/- 0.86 diopter in Groups 1 and 2, respectively (p = 0.426). CONCLUSIONS: There was no statistically significant difference between the two groups. Thus, corneal incision on the inferior side in patients of with-the-rule astigmatism can reduce the SIA and mean change in corneal astigmatism for patients with glaucoma, hard upper eyelid tension or sunken eye.
Key Words: Cataract surgery;Corneal astigmatism;Inferior clear corneal incision;Superior clear corneal incision;Surgically-induced astigmatism


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