Comparison of refractive outcomes and high-order aberrations after small incision lenticule extraction and wavefront-guided femtosecond-assisted laser in situ keratomileusis for correcting high myopia and myopic astigmatism

2020 ◽  
Vol 40 (12) ◽  
pp. 3481-3489
Author(s):  
Mehmet Gulmez ◽  
Abdulhakim Tekce ◽  
Umit Kamıs
Keyword(s):  
High Myopia ◽  
High Order ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Refractive Outcomes ◽  
Lenticule Extraction ◽  
Myopic Astigmatism ◽  
High Order Aberrations

scholarly journals The Correlation Analysis between Corneal Biomechanical Properties and the Surgically Induced Corneal High-Order Aberrations after Small Incision Lenticule Extraction and Femtosecond Laser In Situ Keratomileusis

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Wenjing Wu ◽  
Yan Wang
Keyword(s):  
Femtosecond Laser ◽  
High Order ◽  
Corneal Biomechanics ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Surgically Induced ◽  
High Order Aberrations

Background. To investigate the correlation between corneal biomechanics and the surgically induced corneal high-order aberrations (HOAs) after small incision lenticule extraction (SMILE) and femtosecond laser in situ keratomileusis (FS-LASIK).Methods. A total of 150 right myopic eyes that underwent SMILE or FS-LASIK surgery were included in this retrospective study, 75 eyes in each group. The corneal hysteresis (CH) and the corneal resistance factor (CRF) with the corneal HOAs of the anterior, posterior, and total cornea were assessed preoperatively and three months postoperatively. Multivariate linear regression was applied to determine the correlations.Results. The preoperative CRF was significantly correlated with the induced 3rd–6th-order HOAs and spherical aberration of the anterior surface and the total cornea after SMILE and FS-LASIK surgeries (P<0.05), postoperatively. The CRF was significantly correlated with the induced vertical coma of the anterior and posterior surfaces and the total cornea after SMILE surgery (P<0.05). There was a significant correlation between the CRF and the induced posterior corneal horizontal coma after FS-LASIK surgery (P=0.013).Conclusions. The corneal biomechanics affect the surgically induced corneal HOAs after SMILE and FS-LASIK surgery, which may be meaningful for screening the patients preoperatively and optimizing the visual qualities postoperatively.

scholarly journals Comparison of clinical outcomes of implantable collamer lens versus femtosecondlaser in situ keratomileusis and small incision lenticule extraction for moderate-to-high myopia and myopic astigmatism correction

2021 ◽  
Vol 17 (4) ◽  
pp. 400-415
Author(s):  
Yen Hai Tran ◽  
Huy Dinh Minh Tran ◽  
Ly Thi-Hai Tran ◽  
Dung Thi Mong Nguyen ◽  
Chuong Nguyen Thao Le ◽  
...  
Keyword(s):  
High Myopia ◽  
Linear Models ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Implantable Collamer Lens ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Safety Indices ◽  
Myopic Astigmatism

Purpose: To compare safety, efficacy, stability, and predictability of implantable collamer lens (ICL) with femtosecond-laser in situ keratomileusis (FS-LASIK) or small incision lenticule extraction (SMILE) for the correction of moderate-to-high myopia/myopic astigmatism. Study design: We retrospectively collected data from patients with moderate-to-high myopia/myopic astigmatism (spherical equivalent [SE] ≥ −3.00 diopters [D]) who underwent ICL (48 eyes), FS-LASIK (36 eyes), or SMILE (86 eyes) at Hai Yen Eye Center from October 2016 to February 2018. Materials and methods: The Wilcoxon Mann-Whitney U test was used to compare pre- and postoperative patients’ characteristics of ICL with SMILE or FS-LASIK. Generalized linear models with unstructured correlation matrix and robust standard errors were used to analyze efficacy and safety indices; logistic regression was used for cylinder predictability. Results: After controlling for age, preoperative SE, and preoperative corrected distance visual acuity (pCDVA), SMILE had significantly lower safety indices (Coefficient = −0.04, 95% CI = −0.07–−0.01) and efficacy indices (Coefficient = −0.10, 95% CI = −0.20–−0.01) than did ICL, while FS-LASIK was not significantly different from ICL (Coefficient = −0.02, 95% CI = −0.06–0.02 and Coefficient = −0.01, 95% CI= −0.10–0.09, respectively). ICL SEswere stable over 12 months after surgery. However, in FS-LASIK and SMILE, SEs significantly decreased at 12 months compared with 6 months after surgery. The percentage of eyes that underwent FS-LASIK and had target SEs within ±0.5 D at 12 months was significantly lower than those that underwent ICL (OR = 0.14, 95% CI = 0.02–0.85), after controlling for age, preoperative SE, and pCDVA. Conclusion: For the correction of moderate-to-high myopia/myopic astigmatism, ICL seems to perform better than SMILE and FS-LASIK.

scholarly journals SMILE and Wavefront-Guided LASIK Out-Compete Other Refractive Surgeries in Ameliorating the Induction of High-Order Aberrations in Anterior Corneal Surface

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Min-jie Ye ◽  
Cai-yuan Liu ◽  
Rong-feng Liao ◽  
Zheng-yu Gu ◽  
Bing-ying Zhao ◽  
...  
Keyword(s):  
Spherical Aberration ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Corneal Surface ◽  
Small Incision ◽  
Significant Difference ◽  
Lenticule Extraction ◽  
A Prospective Study ◽  
High Order Aberrations

Purpose. To compare the change of anterior corneal higher-order aberrations (HOAs) after laser in situ keratomileusis (LASIK), wavefront-guided LASIK with iris registration (WF-LASIK), femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK), and small incision lenticule extraction (SMILE).Methods. In a prospective study, 82 eyes underwent LASIK, 119 eyes underwent WF-LASIK, 88 eyes underwent FS-LASIK, and 170 eyes underwent SMILE surgery. HOAs were measured with Pentacam device preoperatively and 6 months after surgery. The aberrations were described as Zernike polynomials, and analysis focused on total HOAs, spherical aberration (SA), horizontal coma, and vertical coma over 6 mm diameter central corneal zone.Results. Six months postoperatively, all procedures result in increase of anterior corneal total HOAs and SA. There were no significant differences in the induced HOAs between LASIK and FS-LASIK, while SMILE induced fewer total HOAs and SA compared with LASIK and FS-LASIK. Similarly, WF-LASIK also induced less total HOAs than LASIK and FS-LASIK, but only fewer SA than FS-LASIK (P<0.05). No significant difference could be detected in the induced total HOAs and SA between SMILE and WF-LASIK, whereas SMILE induced more horizontal coma and vertical coma compared with WF-LASIK (P<0.05).Conclusion. FS-LASIK and LASIK induced comparable anterior corneal HOAs. Compared to LASIK and FS-LASIK, both SMILE and WF-LASIK showed advantages in inducing less total HOAs. In addition, SMILE also possesses better ability to reduce the induction of SA in comparison with LASIK and FS-LASIK. However, SMILE induced more horizontal coma and vertical coma compared with WF-LASIK, indicating that the centration of SMILE procedure is probably less precise than WF-LASIK.

scholarly journals Three-year outcomes of small incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) for myopia and myopic astigmatism

2018 ◽  
Vol 103 (4) ◽  
pp. 565-568 ◽  
Author(s):  
Tian Han ◽  
Ye Xu ◽  
Xiao Han ◽  
Li Zeng ◽  
Jianmin Shang ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Femtosecond Laser ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Myopic Astigmatism

AimsTo compare long-term clinical outcomes following small incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) for myopia and myopic astigmatism correction.MethodsIn this retrospective study, we enrolled a total of 101 patients (101 eyes) who underwent SMILE or FS-LASIK 3 years prior. Measured parameters included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction and corneal wavefront aberrations.ResultsNo significant differences in patient characteristics were found between the two groups. At the 3-year follow-up, UDVA was better than or equal to 20/20 in 90% and 85% (p=0.540) of the eyes; the efficacy indexes were 1.05±0.19 and 1.01±0.21 in the SMILE and FS-LASIK groups, respectively (p=0.352). Safety indexes were 1.19±0.17 and 1.15±0.20 in the SMILE and FS-LASIK groups, respectively (p=0.307). Eighty per cent and 65% of eyes were within ±0.50 D of the attempted spherical equivalent correction after SMILE and FS-LASIK, respectively (p=0.164). Vector analysis revealed no significant differences in astigmatic correction between the two groups (p>0.05). Surgically induced spherical aberration was higher in the FS-LASIK group than in the SMILE group (p<0.001).ConclusionLong-term follow-up analysis suggested that both SMILE and FS-LASIK were safe and equally effective for myopic and astigmatic correction.

Five-year outcomes of small-incision lenticule extraction vs femtosecond laser–assisted laser in situ keratomileusis: a contralateral eye study

2020 ◽  
Vol 46 (3) ◽  
pp. 403-409 ◽  
Author(s):  
Beril Tülü Aygün ◽  
Kadir İlker Çankaya ◽  
Alper Ağca ◽  
Yusuf Yıldırım ◽  
Burçin Kepez Yıldız ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser In Situ Keratomileusis ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Contralateral Eye

scholarly journals Four-Year Outcomes of Small Incision Lenticule Extraction for Extreme High Myopia and Myopic Astigmatism

2020 ◽  
Vol 7 ◽  
Author(s):  
Fei Xia ◽  
Bing Qin ◽  
Jianmin Shang ◽  
Zhuoyi Chen ◽  
Xueyi Zhou ◽  
...  
Keyword(s):  
High Myopia ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Myopic Astigmatism
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