KMID : 0360220180590060505
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Journal of the Korean Ophthalmological Society 2018 Volume.59 No. 6 p.505 ~ p.510
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Effect of the Corneal Incision Direction Using an Image-guided System on Residual Astigmatism
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Jeon Seung-Hee
Park Chang-Hyun Kim Hyun-Seung
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Abstract
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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¢ç; 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 ¡¾ 0.58 D; after, 0.84 ¡¾ 0.51 D; p = 0.049] and [control group 2; before, 1.38 ¡¾ 0.62 D; after, 1.24 ¡¾ 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 ¡¾ 0.81 D; after, 0.61 ¡¾ 0.69 D; p = 0.034] and [control group 2; before, 0.61 ¡¾ 0.69 D; after, 0.43 ¡¾ 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.
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KEYWORD
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Astigmatism, Cataract, Image-guided system
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