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Comparison of corneal aberrations and refractive outcomes after small-incision lenticule extraction and femtosecond-assisted laser-assisted in situ keratomileusis

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Abstract

Purposes

To retrospectively compare the short-term refractive outcomes and corneal aberrations after small-incision lenticule extraction (SMILE) and femtosecond-assisted laser-assisted in situ keratomileusis (FS-LASIK) combined with smart pulse technology (SPT) in patients with compound myopic astigmatism.

Methods

A total of 91 eyes (91 patients) were included, 43eyes in FS-LASIK group and 48 eyes in the SMILE group. Uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), refractive results and corneal topography were evaluated 1 and 3 months postoperatively. Corneal aberrations of anterior corneal surface were calculated from the topography data over 6 mm-diameter.

Results

There was no significant difference in UCVA, BCVA, and refractive results between the two groups. There were no statistical difference in TIA (target induced astigmatism), SIA (surgery induced astigmatism), DV (difference vector), ME (magnitude of error), AE (angle of error), AE (absolute value) and CI (correction index) between both groups at 1 and 3 months. Coma and spherical aberration improved in all the patients in both groups at 1 and 3 months postoperatively. The amount of induced spherical aberrations was higher in FS-LASIK group compared to SMILE group.

Conclusions

Both FS-LASIK and SMILE achieved similar refractive outcomes in patients with myopia and compound myopic astigmatism. FS-LASIK combined with SPT resulted in higher spherical aberration than SMILE in early postoperative period.

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Data availability of statement

Data are available upon request.

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Acknowledgements

The authors would like to express their deepest gratitude to all the participants in this study.

Funding

This study was funded by Science and Technology Project of Shantou City, Guangdong, China (2019–106).

Author information

Author notes

  1. Riping Zhang and Heng Wei contributed equally to this work.

Authors and Affiliations

  1. Joint Shantou International Eye Center of Shantou University, The Chinese University of Hong Kong, Shantou, 515041, China

    Riping Zhang, Heng Wei, Vishal Jhanji, Lixia Sun, Jinyu Li, Jingjing Jiang, Suoqing Zhuang & Mingzhi Zhang

  2. Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

    Vishal Jhanji

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  1. Riping Zhang
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Contributions

RZ contributed to surgeon, conception and design; MZ contributed to financial support and provision of study materials. LS, JL and JJ contributed to collection and/or assembly of data. HW, SZ and VJ contributed to data analysis and interpretation and manuscript writing. RZ and MZ contributed to final approval of manuscript.

Corresponding author

Correspondence to Riping Zhang.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

The study protocol was approved by the Ethics Committee for Human Research at the Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong, which is in accordance with the tenets of the Declaration of Helsinki.

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

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Zhang, R., Wei, H., Jhanji, V. et al. Comparison of corneal aberrations and refractive outcomes after small-incision lenticule extraction and femtosecond-assisted laser-assisted in situ keratomileusis. Int Ophthalmol 41, 2521–2531 (2021). https://doi.org/10.1007/s10792-021-01810-4

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