Comparison of Changes in Corneal Volume and Corneal Thickness After Myopia Correction Between LASIK and SMILE

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2021 May 4

PMID 33945570

Citations 6

Authors

Anna Schuh

Carolin M Kolb

Wolfgang J Mayer

Efstathios Vounotrypidis

Thomas Kreutzer

Thomas Kohnen

Siegfried Priglinger

Mehdi Shajari

Daniel Kook

Affiliations

Soon will be listed here.

Abstract

Myopia is the most common refractive error. Surgical correction with laser is possible. LASIK and SMILE are the techniques currently most used. Aim of the study was to compare changes in corneal volume and thickness after the respective laser treatment. 104 eyes of 52 patients were matched based on refractive error into two equally sized groups, either treated with LASIK or SMILE. Measurements were obtained from the Scheimpflug camera (Pentacam) preoperatively and at 3 and 12 months postoperatively. 3 months postoperatively, the flapless SMILE procedure resulted in a significant overall greater loss of corneal volume (P < 0.01) and corneal thickness (P < 0.01) compared to LASIK. No significant difference was found when comparing the 3 to 12-months values in each group. Within the currently used ranges of refractive error correction, loss in central corneal thickness and corneal volume with SMILE is higher in comparison to LASIK. As greater loss in corneal volume and thickness might contribute to higher level of corneal instability maximum ranges of refractive error correction with SMILE should not supersede those set currently for LASIK until more long-term results on corneal ectasia are available for SMILE.

Citing Articles

A Comparative and Prospective Study of Corneal Consumption and Corneal Biomechanics After SMILE and FS-LASIK Performed on the Contralateral Eyes With High Myopic Astigmatism.

Hou X, Chen P, Yu N, Luo Y, Wei H, Zhuang J Transl Vis Sci Technol. 2024; 13(11):29.

PMID: 39576656 PMC: 11587908. DOI: 10.1167/tvst.13.11.29.

Ten-year evaluation on efficacy, safety, and predictability of femtosecond laser corneal small incision lenticule extraction for correction of myopia and myopic astigmatism: a case series.

Zhao G, Zhang L, Sun Y, Wang J, Chen C, Cao K Ann Med Surg (Lond). 2024; 86(11):6761-6765.

PMID: 39525777 PMC: 11543156. DOI: 10.1097/MS9.0000000000002549.

Comparison of the repeatability and reproducibility of corneal thickness mapping using optical coherence tomography according to tear film break-up time.

Lin K, Xu Z, Wang H, Wang Y, Wei L, Ma H BMC Ophthalmol. 2024; 24(1):275.

PMID: 38970043 PMC: 11227131. DOI: 10.1186/s12886-024-03536-0.

Corneal remodeling after SMILE for moderate and high myopia: short-term assessment of spatial changes in corneal volume and thickness.

Wu Y, Shen T, Tan L, He T, Zheng Q, Hong C BMC Ophthalmol. 2023; 23(1):402.

PMID: 37803347 PMC: 10559442. DOI: 10.1186/s12886-023-03148-0.

Understanding Corneal Epithelial Thickness Mapping.

Alghamdi A, Khan M, Dakhil T Middle East Afr J Ophthalmol. 2023; 29(3):147-155.

PMID: 37408717 PMC: 10319081. DOI: 10.4103/meajo.meajo_207_22.

References

Wang B, Zhang Z, Naidu R, Chu R, Dai J, Qu X . Comparison of the change in posterior corneal elevation and corneal biomechanical parameters after small incision lenticule extraction and femtosecond laser-assisted LASIK for high myopia correction. Cont Lens Anterior Eye. 2016; 39(3):191-6. DOI: 10.1016/j.clae.2016.01.007. View

Kanellopoulos A . Topography-Guided LASIK Versus Small Incision Lenticule Extraction (SMILE) for Myopia and Myopic Astigmatism: A Randomized, Prospective, Contralateral Eye Study. J Refract Surg. 2017; 33(5):306-312. DOI: 10.3928/1081597X-20170221-01. View

Munnerlyn C, Koons S, Marshall J . Photorefractive keratectomy: a technique for laser refractive surgery. J Cataract Refract Surg. 1988; 14(1):46-52. DOI: 10.1016/s0886-3350(88)80063-4. View

Kobashi H, Kamiya K, Igarashi A, Takahashi M, Shimizu K . Two-years results of small-incision lenticule extraction and wavefront-guided laser in situ keratomileusis for Myopia. Acta Ophthalmol. 2017; 96(2):e119-e126. DOI: 10.1111/aos.13470. View

Luft N, Schumann R, Dirisamer M, Kook D, Siedlecki J, Wertheimer C . Wound Healing, Inflammation, and Corneal Ultrastructure After SMILE and Femtosecond Laser-Assisted LASIK: A Human Ex Vivo Study. J Refract Surg. 2018; 34(6):393-399. DOI: 10.3928/1081597X-20180425-02. View

Pedersen I, Bak-Nielsen S, Vestergaard A, Ivarsen A, Hjortdal J . Corneal biomechanical properties after LASIK, ReLEx flex, and ReLEx smile by Scheimpflug-based dynamic tonometry. Graefes Arch Clin Exp Ophthalmol. 2014; 252(8):1329-35. DOI: 10.1007/s00417-014-2667-6. View

Gatinel D, Hoang-Xuan T, Azar D . Volume estimation of excimer laser tissue ablation for correction of spherical myopia and hyperopia. Invest Ophthalmol Vis Sci. 2002; 43(5):1445-9. View

Riau A, Angunawela R, Chaurasia S, Lee W, Tan D, Mehta J . Early corneal wound healing and inflammatory responses after refractive lenticule extraction (ReLEx). Invest Ophthalmol Vis Sci. 2011; 52(9):6213-21. DOI: 10.1167/iovs.11-7439. View

Pallikaris I, Papatzanaki M, Stathi E, Frenschock O, Georgiadis A . Laser in situ keratomileusis. Lasers Surg Med. 1990; 10(5):463-8. DOI: 10.1002/lsm.1900100511. View

10.

Winkler M, Shoa G, Xie Y, Petsche S, Pinsky P, Juhasz T . Three-dimensional distribution of transverse collagen fibers in the anterior human corneal stroma. Invest Ophthalmol Vis Sci. 2013; 54(12):7293-301. PMC: 4589141. DOI: 10.1167/iovs.13-13150. View

11.

Kohnen T, Steinwender G . [Laser in situ keratomileusis with microkeratome or femtosecond laser]. Ophthalmologe. 2017; 114(7):661-665. DOI: 10.1007/s00347-017-0517-8. View

12.

Qazi M, Sanderson J, Mahmoud A, Yoon E, Roberts C, Pepose J . Postoperative changes in intraocular pressure and corneal biomechanical metrics Laser in situ keratomileusis versus laser-assisted subepithelial keratectomy. J Cataract Refract Surg. 2009; 35(10):1774-88. DOI: 10.1016/j.jcrs.2009.05.041. View

13.

Petsche S, Chernyak D, Martiz J, Levenston M, Pinsky P . Depth-dependent transverse shear properties of the human corneal stroma. Invest Ophthalmol Vis Sci. 2011; 53(2):873-80. PMC: 3317426. DOI: 10.1167/iovs.11-8611. View

14.

Shah R, Shah S, Sengupta S . Results of small incision lenticule extraction: All-in-one femtosecond laser refractive surgery. J Cataract Refract Surg. 2010; 37(1):127-37. DOI: 10.1016/j.jcrs.2010.07.033. View

15.

Chen M, Lee N, Bourla N, Hamilton D . Corneal biomechanical measurements before and after laser in situ keratomileusis. J Cataract Refract Surg. 2008; 34(11):1886-91. DOI: 10.1016/j.jcrs.2008.06.035. View

16.

Greenstein S, Fry K, Hersh P . In vivo biomechanical changes after corneal collagen cross-linking for keratoconus and corneal ectasia: 1-year analysis of a randomized, controlled, clinical trial. Cornea. 2011; 31(1):21-5. DOI: 10.1097/ICO.0b013e31821eea66. View

17.

Xiong S, Sankaridurg P, Naduvilath T, Zang J, Zou H, Zhu J . Time spent in outdoor activities in relation to myopia prevention and control: a meta-analysis and systematic review. Acta Ophthalmol. 2017; 95(6):551-566. PMC: 5599950. DOI: 10.1111/aos.13403. View

18.

Agca A, Ozgurhan E, Demirok A, Bozkurt E, Celik U, Ozkaya A . Comparison of corneal hysteresis and corneal resistance factor after small incision lenticule extraction and femtosecond laser-assisted LASIK: a prospective fellow eye study. Cont Lens Anterior Eye. 2013; 37(2):77-80. DOI: 10.1016/j.clae.2013.05.003. View

19.

Sekundo W, Kunert K, Blum M . Small incision corneal refractive surgery using the small incision lenticule extraction (SMILE) procedure for the correction of myopia and myopic astigmatism: results of a 6 month prospective study. Br J Ophthalmol. 2010; 95(3):335-9. DOI: 10.1136/bjo.2009.174284. View

20.

Dawson D, Kramer T, Grossniklaus H, Waring 3rd G, Edelhauser H . Histologic, ultrastructural, and immunofluorescent evaluation of human laser-assisted in situ keratomileusis corneal wounds. Arch Ophthalmol. 2005; 123(6):741-56. DOI: 10.1001/archopht.123.6.741. View