Vector analysis of astigmatic changes after small-incision lenticule extraction and wavefront-guided laser in situ keratomileusis

被引:53
|
作者
Khalifa, Mounir A. [1 ,2 ]
Ghoneim, Ahmed M. [1 ]
Shaheen, Mohamed Shafik [2 ,3 ]
Pinero, David P. [4 ]
机构
[1] Tanta Univ, Ophthalmol Dept, El Geish St, Tanta, El Gharbia Gove, Egypt
[2] Alexandria Univ, Horus Vis Correct Ctr, Alexandria, Egypt
[3] Alexandria Univ, Ophthalmol Dept, Alexandria, Egypt
[4] Univ Alicante, Dept Opt, Pharmacol & Anat, Alicante, Spain
来源
JOURNAL OF CATARACT AND REFRACTIVE SURGERY | 2017年 / 43卷 / 06期
关键词
ASSISTED LASIK; MYOPIC ASTIGMATISM; CLINICAL-OUTCOMES; IRIS REGISTRATION; FS-LASIK; SMILE; ABERRATIONS; MODERATE;
D O I
10.1016/j.jcrs.2017.03.033
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Purpose: To evaluate and compare the efficacy of the astigmatic correction after wavefront-guided laser in situ keratomileusis (LASIK) and small-incision lenticule extraction (SMILE) and in myopic eyes. Design: Prospective case series. Setting: Horus Vision Correction Center and Ellite Vision Correction Center, Alexandria, Egypt. Methods: Myopic eyes with astigmatism up to 4.00 diopters (D) had wavefront-guided LASIK or small-incision lenticule extraction. Visual and refractive changes were evaluated during a 6-month follow-up. The astigmatic changes were evaluated using the Alpins method. Result: The study evaluated 107 eyes (55 patients), 52 eyes having wavefront-guided LASIK and 55 eyes, small-incision lenticule extraction. No statistically significant differences were found in the 6-month postoperative sphere between the 2 groups (P = .652). The postoperative manifest cylinder and spherical equivalent were significantly lower in the wavefront-guided LASIK group (P < .001). The 6-month postoperative cylinder was 0.50 D or less in all eyes in the wavefront-guided LASIK groups and in 79.8% in the small-incision lenticule extraction group (P < .001). Vector analysis showed a significantly higher difference vector (P < .001) and angle of error (P = .021) and a significantly lower correction index (P = .001) in the small-incision lenticule extraction group. The mean magnitude of error was -0.07 +/- 0.20 (SD) and -0.20 +/- 0.35 in the wavefront-guided LASIK group and small incision lenticule extraction group, respectively (P = .012). Conclusion: Wavefront-guided LASIK and small-incision lenticule extraction were safe and effective for the correction of myopic astigmatism, although there was a trend toward undercorrection with small-incision lenticule extraction. (C) 2017 ASCRS and ESCRS.
引用
收藏
页码:819 / 824
页数:6
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