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Laser in situ keratomileusis (LASİK) in patients with superior steepening on corneal topography: Is it safe and predictable?

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Abstract

Background

Attention is usually given to inferior steepening on corneal topography in the evaluation of a patient’s suitability for LASIK surgery. The aim of this study is to investigate long-term refractive results with superior steepening.

Methods

Patients who underwent LASIK surgery between 2015 and 2019 in our refractive surgery department were retrospectively reviewed. The patients with a ≥ 1.0 D superior–inferior (S–I) quadrant difference in the tangential map, using a Scheimpflug camera with a Placido disc topographer (Sirius), were included in the study. Preoperative and postoperative best-corrected and uncorrected visual acuity (Snellen), cylindrical refraction values, and spherical equivalent (SE) values were compared. Adverse events were recorded.

Results

Fifty eyes of 28 patients participated in the study. The mean age of the patients was 27.5 ± 8.0 (19–59). Sixteen patients were female (57.1%), and 12 (42.8%) patients were male. The average follow-up time was 29.8 ± 11.1 months (12–61). Average central corneal thickness was 549.4 ± 26.0 (498–602) μm. Average minimal corneal thickness was 549.1 ± 26.9 (497–598) μm. Preoperative S–I quadrant difference (D) was 1.87 ± 0.7 (1.0–3.99). Posterior elevation (Kvb) was 11.2 ± 1.9 (9–17) μm. The preoperative SE value was − 1.7 ± 2.1 (− 6.25–3.25) and improved to − 0.3 ± 0.44 D (− 1.25–0.75) (p < 0.001). Preoperative cylindrical refraction values were − 2.04 ± 1.7 (− 6.25–0), and postoperative values were − 0.47 ± 0.4 (− 2–0) D (p < 0.001). Uncorrected visual acuity was median 1.0 (0.4–1.0) with 38 eyes (76%) having 20/20 postoperative uncorrected visual acuity. No sight threatening complications or ectasia findings were observed during the 2 years postoperative follow-up time.

Conclusions

Abnormal corneal topographies with (S–I) asymmetry result in predictable results after LASIK.

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Acknowledgements

This study was presented as a poster at the American Society of Cataract and Refractive Surgery (ASCRS) 2018, Washington Meeting.

Funding

No funding was provided for this research.

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Authors and Affiliations

  1. University of Health Sciences, Beyoğlu Eye Training and Research Hospital, Açelya sokak Darüşşafaka mah Yonca sitesi B4 blok kat 4 daire 18, Istanbul, Turkey

    Burcin Kepez Yildiz, Burcu Kemer Atik, Yusuf Yildirim, Alper Agca, Dilek Yasa, Nilay Kandemir Besek, Ebru Demet Aygit & Ahmet Demirok

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  1. Burcin Kepez Yildiz
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  2. Burcu Kemer Atik
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  3. Yusuf Yildirim
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  4. Alper Agca
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  5. Dilek Yasa
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  6. Nilay Kandemir Besek
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  7. Ebru Demet Aygit
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Correspondence to Burcin Kepez Yildiz.

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Ethical approval

The study was approved by the Okmeydanı Training and Research Hospital Ethic Committee and was carried out in accordance with the Declaration of Helsinki.

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Informed consent was obtained from all individual participants.

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Kepez Yildiz, B., Kemer Atik, B., Yildirim, Y. et al. Laser in situ keratomileusis (LASİK) in patients with superior steepening on corneal topography: Is it safe and predictable?. Int Ophthalmol 40, 2353–2359 (2020). https://doi.org/10.1007/s10792-020-01420-6

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  • DOI: https://doi.org/10.1007/s10792-020-01420-6

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