Changes in higher order aberrations after wavefront guided FS-LASIK for myopia combined with moderate to high astigmatism
10.3980/j.issn.1672-5123.2018.2.50
- VernacularTitle:波前像差引导FS-LASIK治疗近视合并中高度散光患者术后高阶像差变化
- Author:
Cang-Yu GUAN
1
,
2
;
Ai-Min YAN
;
Yuan YAO
;
Xue LI
;
Zhong-Xiang XIE
;
Ting-Ting HU
;
Chi ZHANG
Author Information
1. 550000 中国贵州省贵阳市,华厦眼科医院集团贵阳阳明眼科医院
2. 550000 中国贵州省贵阳市第一人民医院眼科
- Keywords:
femtosecond laser assisted laser-assisted in situ keratomileusis;
wavefront-guided;
astigmatism;
higher order aberration
- From:
International Eye Science
2018;18(2):393-395
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To assess the changes in higher order aberrations after wavefront guided femtosecond laser assisted laser in situ keratomileusis ( FS-LASIK ) for moderate to high astigmatism.?METHODS: Eighty-eight eyes of 50 myopia patients with moderate to high astigmatism were included in this prospective study. There were 51 eyes with moderate astigmatism (≥-1. 50D and <-3. 00D) and 37 eyes with high astigmatism (≥-3. 00D). All patients underwent wavefront guided FS-LASIK. Uncorrected distance visual acuity ( UDVA ) , corrected distance visual acuity (CDVA), keratometry, central corneal thickness ( CCT)and higher order aberrations ( HOAs ) were evaluated before operation and 3mo postoperatively.?RESULTS:At the 3mo after operation, the mean UDVA of all eyes was above 20/20, better than before operation (P<0. 05), but CDVA remained unchanged (P=0. 36) and no eyes lost ≥2 lines of CDVA. Mean astigmstism of 85 eyes ( 97％) was reduced below - 1. 00D, mean astigmatism of 70 eyes ( 80％) was reduced below-0.50D(P<0. 05). The average corneal curvature was flatter by 3. 81 ± 1. 97D and CCT was reduced by 78. 66 ± 37. 22μm, postoperatively (P<0. 05). Coma and trefoil aberrations remained unchanged(P=0. 078, 0. 065). The spherical aberration, secondary astigmatism and the HOA root mean square ( RMS ) increased from 0. 19 ± 0. 06, 0.05±0. 02 and 0. 42±0. 12, preoperatively to 0. 32± 0. 17, 0. 26 ± 0. 08 and 0. 78 ± 0. 28 ( P < 0. 05 ), postoperatively.?CONCLUSION: Wavefront-guided FS-LASIK is a safe and effective option for the patients with moderate to high astigmstism although parts of HOAs increased.
