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Yum and Kim: The Long-Term Refractive Change after Cataract Surgery in Myopic Patients with a History of LASIK
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(12): 1777-1782.

Published online: 17 December 2012

DOI: https://doi.org/10.3341/jkos.2012.53.12.1777

The Long-Term Refractive Change after Cataract Surgery in Myopic Patients with a History of LASIK

Hae Ri Yum, MD, Man Soo Kim, MD, PhD

Department of Ophthalmology and Visual Science, The Catholic University of Korea College of Medicine, Seoul, Korea.

Address reprint requests to Man Soo Kim, MD, PhD. Department of Ophthalmology, The Catholic University of Korea, Seoul St. Mary's Hospital, #222 Banpo-daero, Seocho-gu, Seoul 137-701, Korea. Tel: 82-2-2258-6197, Fax: 82-2-599-7405, mskim@catholic.ac.kr

Received 17 April 2012       Accepted 24 November 2012

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To evaluate the long-term change of postoperative refraction after cataract surgery in patients with a history of LASIK.

Methods

A retrospective chart review was performed on 40 eyes of 28 patients who had undergone cataract surgery with a history of LASIK, and 40 eyes of 31 patients who had undergone cataract surgery without LASIK. We evaluated preoperative target refraction, and postoperative refraction during the 2-year follow-up period.

Results

In the group with a history of LASIK, the target refraction was -1.00 ± 0.98 D, the 2-month postoperative spherical equivalent was -0.53 ± 1.92 D, and the 2-year postoperative spherical equivalent was -1.03 ± 1.84 D. In the group with cataract surgery only, the target refraction was -1.44 ± 1.06 D, the 2-month postoperative spherical equivalent was -1.07 ± 1.27 D, and the 2-year postoperative spherical equivalent was -0.97 ± 1.28 D. The difference in mean spherical equivalent at 2 months postoperatively and at 2 years postoperatively between the 2 groups was statistically significant (p = 0.037). The difference in mean spherical equivalent preoperatively and 2 years postoperatively between the 2 groups was statistically significant (p = 0.002). In the group with cataract surgery only, the postoperative refraction shifted to hyperopic refractive power, and was statistically significant. In the group with a history of LASIK, there were no statistically significant differences between preoperative and postoperative refraction. There were no statistically significant differences according to the cataract type in the group with a history of LASIK. The greater the myopic preoperative spherical equivalent was, the shorter the duration between LASIK and cataract surgery, which was significant in the group with a history of LASIK.

Conclusions

The long-term refractive change after cataract surgery was statistically significant between the cataract surgery after LASIK group and the cataract surgery alone group.

Keywords: Cataract surgery, LASIK, Myopia, Refraction

Figures and Tables

Figure 1
Changes in mean spherical equivalent preoperatively and at 2 months and 2 years postoperatively in the group of cataract surgery after LASIK and the group of cataract surgery alone. *p < 0.05, paired t-test.
jkos-53-1777-g001
Figure 2
Scatter grams of preoperative spherical equivalent and time interval between cataract surgery and LASIK shows positive linear regression (Pearson correlation analysis, r2 = 0.478, p = 0.002).
jkos-53-1777-g002
Table 1
Demographic data of the patients included in the study
jkos-53-1777-i001

Values are presented as mean ± SD.

Student t-test.

Table 2
Comparison of postoperative mean spherical equivalent differences between the groups
jkos-53-1777-i002

Values are presented as mean ± SD.

Student t-test.

SE = spherical equivalent; TD = target diopter.

Table 3
Comparison of postoperative mean spherical equivalent differences according to cataract type in cataract surgery with history of LASIK
jkos-53-1777-i003

Values are presented as mean ± SD.

Kruskal-Wallis test.

SE = spherical equivalent; TD = target diopter.

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