Effect of the Corneal Incision Direction Using an Image-guided System on Residual Astigmatism.

Jeon, Seung Hee; Park, Chang Hyun; Kim, Hyun Seung

doi:2018.59.6.505

J Korean Ophthalmol Soc > Volume 59(6); 2018 > Article

Original Article

Journal of the Korean Ophthalmological Society 2018;59(6):505-510.
DOI: https://doi.org/10.3341/jkos.2018.59.6.505 Published online June 15, 2018.

Effect of the Corneal Incision Direction Using an Image-guided System on Residual Astigmatism.

Seung Hee Jeon, Chang Hyun Park, Hyun Seung Kim

Department of Ophthalmology and Visual Science, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea. sara514@catholic.ac.kr

이미지 유도 시스템을 이용한 각막 절개 방향에 따른 난시의 감소 효과

전승희⋅박창현⋅김현승

가톨릭대학교 의과대학 여의도성모병원 안과 및 시과학교실

Correspondence: Hyun Seung Kim,
Email: sara514@catholic.ac.kr

Received: 14 February 2018 • Revised: 11 April 2018 • Accepted: 4 June 2018

Abstract

PURPOSE
We evaluated the effect of corneal incision direction using an image-guided system on cataract surgery. METHODS: We retrospectively reviewed patients who underwent cataract surgery at The Catholic University of Korea Yeouido St. Mary's Hospital. The patients were divided into two groups. In group 1 (20 eyes), the corneal incision was made along the steepest axis using the VERION image-guided system (Alcon, Fort Worth, TX, USA). In the control group, group 2 (20 eyes), the incision was made at the vertical or horizontal axis closest to the patient's steepest axis. We compared residual astigmatism and the mean difference in astigmatism before and after cataract surgery between the two groups using an autorefractor keratometer (RK-F1®; Canon, Tokyo, Japan) and a Pentacam system (Oculus, Wetzlar, Germany). RESULTS: Group 1's residual astigmatism was significantly lower than that of group 2 ([VERION group 1; before, 0.89 ± 0.58 D; after, 0.84 ± 0.51 D; p = 0.049] and [control group 2; before, 1.38 ± 0.62 D; after, 1.24 ± 0.62 D; p = 0.043]). The mean difference in astigmatism before and after cataract surgery for group 1 was also larger than group 2 ([VERION group 1; before, 0.71 ± 0.81 D; after, 0.61 ± 0.69 D; p = 0.034] and [control group 2; before, 0.61 ± 0.69 D; after, 0.43 ± 0.61 D; p = 0.048]). CONCLUSIONS: Using an image-guided system, postoperative residual astigmatism from cataract surgery can be minimized using an incision direction that is aligned with the corneal astigmatic axis.

Key Words: Astigmatism;Cataract;Image-guided system