Objective To investigate the changes in higher-order aberrations (HOAs) after small incision lenticule extraction (SMILE) surgery for myopia and myopic astigmatism, and to evaluate the association between the postoperative changes in HOAs and related factors. Methods This was a retrospective study that included 81 patients(162 eyes) who had undergone SMILE for myopia or myopic astigmatism. The follow-up period was 3 months. Ocular HOAs with a 6 mm pupil diameter were measured by a WaveScan aberrometer preoperatively and 3 months postoperatively. The angle kappa and Q value were obtained with an ocular analyzer at same time. Paired t test was used to compare the ocular variables before and after surgery. Spearman rank and Pearson correlation coefficient analysis were used to assess the relationship between changes in total HOA and different HOAs with multiple factors that included pre-SE, astigmatism, angle kappa, etc. Results Statistically significant differences were found in the changes in total HOA (t=-12.24, P<0.01), spherical aberration C40 (t=16.60, P<0.01), C31 (t=-11.06, P<0.01); C3-1 (t=-3.14, P<0.01), Q value (t=-22.55, P<0.01), C3-3 (t=-6.30, P<0.01) and C42 (t=5.84, P<0.01). There were significant correlations between total HOA at the three-month postoperative visit and preoperative SE (r=-0.23, P<0.01). △total HOA was correlated with △C40 (r=-0.40, P<0.01) and △C31 (r=0.26, P<0.01) but was not related to pre-operative Q value, angle kappa or astigmatism (P>0.05). The three-month postoperative C40 and △C40 were correlated with pre-SE (r=0.35, 0.29, P<0.01); C31 was correlated with preoperative cylinder power and Q value (r=-0.24, -0.22, P<0.05), and △C31 was correlated with preoperative cylinder power (r=-0.29, P<0.01). There was no correlation between the postoperative C3-1 and △C3-1 and preoperative SE, Q value, angle kappa, or cylinder power (P>0.05). Conclusion A significant postoperative increase in total HOA after SMILE surgery is correlated with preoperative SE, but is not correlated with the degree of astigmatism. Postoperative C40 was only correlated with preoperative SE, while a postoperative increase in C31 was correlated with the preoperative degree of astigmatism.
梁刚,查旭,张丰菊. SMILE术后全眼高阶像差变化及相关因素分析[J]. 中华眼视光学与视觉科学杂志, 2015, 17(11): 644-648.
Liang Gang*,Zha Xu,Zhang Fengju. Analysis of higher-order aberrations (HOAs) and related factors after small incision lenticule extraction (SMILE) surgery. Chinese Journal of Optometry Ophthalmology and Visual science, 2015, 17(11): 644-648. DOI: 10.3760/cma.j.issn.1674-845X.2015.11.002
Sekundo W, Kunert K, Russmann C, et al. First efficacy and safety study of femtosecond lenticule extraction for the correction of myopia[J]. J Cataract Rdfract Surg,2008,34(9):1513-1520.
[2]
Vestergaard A, Ivarsen AR, Asp S, et al. Small-incision lenticule extraction for moderate to haigh myopia: Predictability, safety, and patient satisfaction[J]. J Cataract Rdfract Surg,2012, 38(11):2003-2010.
[3]
Ivarsen A, Asp S, Hjortdal J. Safety and Complications of More Than 1500 Small-Incision Lenticule Extaction Procedures [J]. Ophthalmology,2014,121(4):822-828.
[4]
Ang M, Tan D,Mehta JS. Small incision lenticule extraction(SMILE) versus laser in-situ keratomileusis(LASIK): study protocol for a randomized, non-inferiority trial[J]. Trials,2012, 13:75.
[5]
Lin F,Xu Y, Yang Y. Comparison of the Visual Results After SMILE and Femtosecond Laser-Assisted LASIK for Myopia[J]. J Refract Surg,2014,30(4):248-254.
[6]
Sekundo W, Kunert KS, Blum M. Small incision corneal refractive surger using the small incision lentcule extraction (SMILE) procedure for the correction of myopia and myopia astigmatism: results of a 6 month prospective study[J]. Br J Ophthalmol,2011,95(3):335-339.
[7]
Vestergaard AH, Gr?覬nbech KT, Grauslund J, et al. Subbasal nerve morphology, corneal sensation, and tear film evaluation after refractive femtosecond laser lenticule extraction[J]. Graefes Arch Clin Exp Ophthalmol,2013,251(11):2591-2600.
[8]
Wang D, Liu M, Chen Y, et al. Differences in the corneal biomechanical changes after SMILE and LASIK[J]. J Refract Surg,2014,30(10):702-707.
[9]
Xu Y, Yang Y. Dry eye after small incision lenticule extraction and LASIK for myopia[J]. J Refract Surg,2014,30(3):186-190.
[10]
Li M, Zhou Z, Shen Y, et al. Comparison of corneal sensation between small incision lenticule extraction (SMILE) and femtosecond laser-assisted LASIK for myopia[J]. J Refract Surg, 2014,30(2):94-100.
[11]
Liang J, Williams DR, Miller DT. Supernirmal vision and high-resolution retinal imaging through adaptive optics[J]. J Opt Soc Am A Opt Image Sci Vis,1997,14(11):2884-2892.
[12]
Zhou C, Chai X, Yuan L, et al. Corneal higher-order aberrations after customized aspheric ablation and conventional ablation for myopic correction[J]. Curr Eye Res,2007,32(5):431-438.
[13]
Buzzonetti L, Petrocelli G, Valente P, et al. Comparison of corneal aberration changes after laser in situ keratomileusis performed with mechanical microkeratome and IntraLase femtosecond laser: 1-year follow-up[J]. Cornea,2008,27(2):174-179.
[14]
Vestergaard A, Ivarsen A, Asp S, et al. Femtosecond (FS) laser vision correction procedure for moderate to high myopia: a prospective study of ReLEx flex and comparison with a retrospective study of FS-laser in situ keratomileusis[J]. Acta Ophthalmol,2013,91(4):355-362.
[15]
Ang M, Chaurasia SS, Angunawela RI, et al. Femtosecond Lenticule Extraction (FLEx): Clinical Results, Interface Evaluation, and Intraocular Pressure Variation[J]. Invest Ophthalmol Vis Sci,2012,53(3):1414-1421.
[16]
Kamiya K, Kimiya Shimizu K, Iqarashi A, et al. Comparison of visual acuity, higher-order aberrations and corneal asphericity after refractive lenticule extraction and wavefront-guided laser-assisted in situ keratomileusis for myopia[J]. Br J Ophthalmol,2013, 97(8):968-975.
Shah R, Shah S, Sengupta S. Results of small incision lenticule extraction: All-in-one femtosecond lenticule refractive surgery [J]. J Cataract Refract Surg,2011,37(1):127-137.