Comparison of ocular higher-order aberrations after SMILE and Wavefront-guided Femtosecond LASIK for myopia

BMC Ophthalmology

Research Article

Xiaojing Li¹  Jiamei Zhang²  Yan Wang²  Xiaoqin Chen²  Lin Zhang²  Shun-nan Yang³ 

[1] First Hospital of Qinhuangdao, Qinhuangdao, Hebei, China;Tianjin Eye Hospital & Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Medical University, No 4. Gansu Rd, Heping District, 300020, Tianjin, China;Vision Performance Institute, Pacific University College of Optometry, Forest Grove, OR, USA;

关键词: Wavefront aberration;    Small incision lenticule extraction;    Wavefront-guided femtosecond LASIK;    Visual quality;    Refractive surgery;   

DOI  :  10.1186/s12886-017-0431-5

 received in 2016-12-13, accepted in 2017-03-31,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundTo compare changes in higher-order aberrations (HOAs) following small incision lenticule extraction (SMILE) and wavefront-guided femtosecond laser-assisted in situ keratomileusis (WFG FS-LASIK), and to investigate correlations between preoperative spherical equivalence (SE) and components of HOAs affecting visual quality.MethodsSixty-five myopic eyes from 38 patients were enrolled in the study retrospectively, either having undergone SMILE or WFG FS-LASIK. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refractive error, and individual Zernike coefficients of 3rd- to 6th-order HOAs were measured before and 3 months after the surgeries and were compared using the Mann-Whitney test or Student’s t-test. Additional generalized estimating equation analyses (GEE) were used to control for within-subject biases in individual Zernike coefficients between the right and left eyes of the same patients.ResultsThere was no significant difference in UDVA or CDVA after WFG FS-LASIK (Mean ± SD: −0.02 ± 0.07 and −0.04 ± 0.22 respectively, in logMAR) and after SMILE (−0.01 ± 0.06 and −0.04 ± 0.04 respectively). However, greater vertical coma aberration was found after SMILE (p = 0.036). Preoperative SE was correlated to induced horizontal coma (r = −0.608, p = 0.001) in WFG FS-LASIK, and correlated to induced vertical coma (r = −0.459, p = 0.003) in SMILE.ConclusionsBoth SMILE and WFG FS-LASIK can achieve planned visual outcomes in correcting myopia and myopic astigmatism. However, higher vertical coma was shown in SMILE than WFG FS-LASIK which might be a potentially impact factor for patients’ vision under certain lighting conditions and needs further investigation.

【 授权许可】

CC BY   
© The Author(s). 2017