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Changes in anterior chamber dimensions following small incision lenticule extraction (SMILE)

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Abstract

Purpose

To evaluate the changes in anterior chamber dimensions including horizontal anterior chamber diameter (HACD), anterior chamber depth (ACD), and iridocorneal angle (ICA) following small incision lenticule extraction (SMILE) using Scheimpflug-Placido disk tomographer (Sirius).

Methods

The records of the 73 eyes of 47 patients who received SMILE for myopia and myopic astigmatism were retrospectively reviewed. Preoperative and 6-month postoperative measurements of central corneal thickness (CCT), HACD, ACD, ICA, nasal anterior chamber angle (nACA), and temporal anterior chamber angle (tACA) were obtained by tomography, and compared with paired t-tests. Pearson’s correlation and linear regression tests were used to evaluate the relationship between these parameters.

Results

The CCT, HACD, and ACD values decreased significantly at 6-month postoperatively (p < 0.05 for all). ICA, nACA, and tACA showed no statistically significant difference postoperatively (p = 0.54, p = 0.118, and p = 0.255, respectively). Pearson’s correlation analysis confirms negative relationship between Δ-HACD and Δ-tACA (r = –0.475, p < 0.01), and a loose negative relationship between change in ACD and change in ICA (r = −0.282, p = 0.016). Age and Δ-tACA were found as predictive parameters for Δ-HACD and, Δ-ICA was a predictor for Δ-ACD.

Conclusion

While HACD and ACD decreased significantly, there was no significant change in ICA, nACA and tACA. Changes in HACD and ACD should be considered in terms of subsequent surgeries after SMILE.

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Acknowledgements

We would like to thank Kürşad Nuri Baydili, PhD for assistance with statistical analysis, and Havva Kanbak (HK) for performing Sirius tomography imaging.

Funding

The authors did not receive any funds/grants or support from any organization for the submitted work.

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Authors and Affiliations

  1. University of Health Sciences Beyoğlu Eye Training and Research Hospital, Beyoglu, Istanbul, Turkey

    Ahmet Kirgiz, Adem Tellioglu, Burçin Kepez Yildiz, Nilay Kandemir Beşek & Ahmet Demirok

  2. Augenklinik Rendsburg, Provianthausstrasse 9, 24768, Rendsburg, Germany

    Beril Tülü Aygün

  3. Medipol Mega Hospital, Istanbul, Turkey

    Şenay Aşik Nacaroğlu

  4. Department of Ophthalmology, University of Health Sciences Başakşehir Çam and Sakura State Hospital, Istanbul, Turkey

    Yusuf Yildirim

Authors
  1. Ahmet Kirgiz
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  2. Beril Tülü Aygün
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  3. Şenay Aşik Nacaroğlu
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  4. Adem Tellioglu
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  5. Yusuf Yildirim
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  6. Burçin Kepez Yildiz
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  7. Nilay Kandemir Beşek
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  8. Ahmet Demirok
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by YY, BKY, ŞAN, AT. The first draft of the manuscript was written by BTA and AK, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Beril Tülü Aygün.

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Conflict of interest

The authors have no conflicts of interest to declare that are relevant to the content of this article.

Ethical approval

The study followed the tenets of Helsinki Declaration and was approved by the local ethical committee of Beyoglu Eye Training and Research Hospital and the ethical committee at University of Health Sciences Okmeydanı Training and Research Hospital.

Human and animal rights

No animals were involved in this study.

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Patients' informed consents and consent to publish were obtained preoperatively.

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Kirgiz, A., Tülü Aygün, B., Aşik Nacaroğlu, Ş. et al. Changes in anterior chamber dimensions following small incision lenticule extraction (SMILE). Int Ophthalmol 43, 305–312 (2023). https://doi.org/10.1007/s10792-022-02429-9

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  • DOI: https://doi.org/10.1007/s10792-022-02429-9

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