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Visual and refractive outcomes of 100 small incision lenticule extractions (SMILE) in moderate and high myopia: a 24-month follow-up study

Abstract

Purpose

We aimed to present the visual results obtained in 100 small incision lenticule extraction (SMILE) refractive surgeries, demonstrate whether the technique is effective in the treatment of moderate and high myopia, and observe the follow-up of these patients over 24-month period.

Methods

One hundred eyes of 50 consecutive patients were treated with SMILE. The preoperative spherical equivalent refraction was − 5.64 ± 1.23 D. During the postoperative period, patients were examined at 3, 6, 12, and 24 months. We analysed the efficacy, safety, predictability, and stability of the technique.

Results

The Snellen visual acuity of 99% of the patients was 20/20 or better after 24 months of follow-up. Two eyes had a loss of two lines of visual acuity; 1% of the patients had a loss of one line of visual acuity. The postoperative spherical refraction was − 0.04 ± 0.35 D (− 1.00 to 0.50 D). The postoperative spherical equivalent refraction was − 0.19 ± 0.38 D (− 1.25 to 0.50 D). Eighty-three percent of the eyes were within ± 0.50 D, and 87% obtained a residual astigmatism of 0.50 D or less.

Conclusion

The SMILE technique was demonstrated to be an effective, predictable, safe, and stable technique in the treatment of moderate-to-severe myopia during the 24-month follow-up. Long-term follow-up should be undertaken to observe possible refractive regressions.

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Acknowledgments

Data collection and support help: Amián-Cordero, Jonatan; Hernández-Barahona, Mariano; Castellanos-Gómez, Ignacio; Socas-Priego, Luisa and López-Martos, Nino.

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Correspondence to José-María Sánchez-González.

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Sánchez-González, José-María declares that he has no conflict of interest. Alonso-Aliste, Federico declares that he has no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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The authors whose names are listed immediately below certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

•Sánchez-González, José-María

•Alonso-Aliste, Federico

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Sánchez-González, JM., Alonso-Aliste, F. Visual and refractive outcomes of 100 small incision lenticule extractions (SMILE) in moderate and high myopia: a 24-month follow-up study. Graefes Arch Clin Exp Ophthalmol 257, 1561–1567 (2019). https://doi.org/10.1007/s00417-019-04349-4

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  • DOI: https://doi.org/10.1007/s00417-019-04349-4

Keywords

  • Small incision lenticule extraction
  • Visual outcomes
  • Femtosecond
  • Refractive surgery