Evaluation of morphological features: femtosecond-LASIK flap vs. SMILE cap, and the effects on corneal higher-order aberrations

He, Xiaoying; He, Qiaojun; Yuan, Meng; Fang, Zhi; Zhang, Kai; Zhu, Tiepei; Han, Wei

doi:10.1007/s00417-022-05841-0

Cited by 5 publications

(3 citation statements)

References 41 publications

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Section: Higher Order Aberrationsmentioning

confidence: 99%

“…There are multiple studies that suggest that SMILE induces less overall higher order aberration (HOA) [40][41][42][43]. He et al [42] evaluated the morphological features of the corneal flap/cap and found that the quality of the flap/cap was closely associated with corneal HOA changes. The study found that SMILE caps had greater uniformity and symmetry than FS-LASIK flaps within the 6 mm optical zone, contributing to less changes in HOAs at postoperative month 3 [42].…”

Section: Higher Order Aberrationsmentioning

confidence: 99%

“…He et al [42] evaluated the morphological features of the corneal flap/cap and found that the quality of the flap/cap was closely associated with corneal HOA changes. The study found that SMILE caps had greater uniformity and symmetry than FS-LASIK flaps within the 6 mm optical zone, contributing to less changes in HOAs at postoperative month 3 [42]. Specific to spherical aberration, studies have found that SMILE has a lower spherical aberration induction rate compared to FS-LASIK [41,44,45].…”

Section: Higher Order Aberrationsmentioning

confidence: 99%

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Femtosecond laser-assisted in situ keratomileusis versus small-incision lenticule extraction: current approach based on evidence

Teo,

Ang

2024

Current Opinion in Ophthalmology

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Purpose of review Laser keratorefractive surgery achieves excellent visual outcomes for refractive error correction. With femtosecond laser, small incision lenticule extraction (SMILE) is an increasingly viable alternative to laser-assisted in situ keratomileusis (LASIK). Comparative studies demonstrate similar efficacy and predictability between SMILE and LASIK, making it difficult for clinicians to choose which to use. This review thus compares femtosecond-LASIK (FS-LASK) and SMILE in various scenarios, to assist clinicians in deciding which refractive surgery procedure to recommend. Recent findings SMILE may be superior for highly myopic eyes due to a smaller decrease in functional optical zone. SMILE further induces less spherical aberration and less overall higher order aberrations in mesopic conditions. SMIILE also has less postoperative dry eye, making it suitable those with preexisting dry eye. For low to moderate myopic astigmatism correction, FS-LASIK has less undercorrection compared to SMILE. Lastly, SMILE has not yet received Food and Drug Administration or Conformité Européenne approval for hyperopic correction, rendering FS-LASIK the choice of procedure for hyperopic correction. Summary Both FS-LASIK and SMILE demonstrate good efficacy and predictability. Understanding specific clinical scenarios where one may be superior to the other will aid clinicians in choosing the most suitable procedure for personalized care.

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