| The Effect of Preoperative Corneal Asphericity on the Refractive Outcomes of Multifocal Intraocular Lens Implantation. |
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Jin Uk Beak, Hee Jong Shin, Chang Hyun Park, Woong Joo Whang, Kyung Sun Na, Hyun Seung Kim |
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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 |
| 다초점인공수정체삽입 후의 굴절력에 대한 수술 전 각막 비구면성의 영향 |
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백진욱⋅신희종⋅박창현⋅황웅주⋅나경선⋅김현승 |
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가톨릭대학교 의과대학 여의도성모병원 안과 및 시과학교실 |
Correspondence:
Hyun Seung Kim,
Email: sara514@catholic.ac.kr
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Received: 13 September 2018 • Revised: 18 October 2018 • Accepted: 28 December 2018 |
| Abstract |
PURPOSE
To analyze the effects of preoperative corneal asphericity on the refractive outcomes of multifocal intraocular lens implantation by correlating Q-values on anterior corneal surfaces and the prediction errors after surgery. METHODS: Fifty-six eyes of 39 patients who underwent phacoemulsification, and multifocal intraocular lens implantation were included in this retrospective study. Intraocular lens power was calculated using the SRK/T, Hoffer Q, and Haigis formulas. The Q-values were measured at 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm with a rotating Sheimpflug camera (Pentacam®, Oculus, Wetzlar, Germany). The relationship between the prediction errors and the Q-values at 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm were assessed by linear regression. RESULTS: Two different multifocal intraocular lens models (Acrysof IQ RESTOR +2.5D SV25T0 [Alcon Laboratories Inc., Fort Worth, TX, USA] and ZEISS AT LISA tri 839MP [Carl Zeiss Meditec AG, Inc., Jena, Germany]) were implanted in 56 eyes. In both groups, regression analyses showed statistically significant relationships between the prediction errors and the Q-values at 6 mm, 7 mm, and 8 mm using the SRK/T formula. The correlation coefficient between the Q-values and the prediction errors were higher using the SRK/T formula than using the Hoffer-Q and Haigis formulas. CONCLUSIONS: Corneal asphericity affected refractive power during implantation of a multifocal intraocular lens and, as the preoperative Q-value increased, it resulted in a hyperopic refractive outcome for oblate corneas. These results were especially prominent when the SRK/T formula was used. |
| Key Words:
Cataract;Cornea;Intraocular lenses;Refractive errors |
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