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Mirshahi A, A. Ponto K. Changes in Pupil Area During Low-energy Femtosecond Laser Assisted Cataract Surgery. JOVR [Internet]. 2019Jul.18 [cited 2024Jul.17];14(3):251–256. Available from: https://knepublishing.com/index.php/JOVR/article/view/4780

https://doi.org/10.18502/jovr.v14i3.4780

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authors

  • Alireza Mirshahi

    Alireza Mirshahi

    Dardenne Eye Hospital, Bonn, Germany
  • Katharina A. Ponto

    Katharina A. Ponto

    Department of Ophthalmology, University Medical Center Mainz, Germany; Center for Thrombosis and Hemostasis, University Medical Center Mainz, Germany

Published Date

  • Jul 18, 2019
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

Changes in Pupil Area During Low-energy Femtosecond Laser Assisted Cataract Surgery

Journal of Ophthalmic and Vision Research (JOVR) / July–September 2019, Volume 14, Issue 3 / Pages 251–256

Abstract

Purpose: To study the potential changes in pupil area within low-energy femtosecond-laser assisted cataract surgery (FLACS).


Methods: A retrospective assessment of the pupil size was performed in the eyes undergoing FLACS using the Ziemer LDV Z8. We measured the pupil diameters as part of the images taken preoperatively and at the completion of laser pretreatment (after releasing the suction). We calculated the pupil area in 40 eyes of 40 patients (14 right and 26 left eyes). The mean ± standard deviation (SD) of age of the patients was 74 ± 7.4 years (range: 51-87). Paired t-test was used for statistical analyses. Subgroups were built with reference to age and preoperative pupil area (smaller than or equal to the median versus larger than the median).


Results: The mean ± SD axial length, anterior chamber depth, white-to-white distance and lens thickness were 24.01 ± 1.47, 3.23 ± 0.4, 11.97 ± 0.49, and 4.59 ± 0.41 mm, respectively. The mean ± SD pupil area was 39.33 ± 7.1 mm2 preoperatively and 39.3 ± 6.75 mm2 after laser pretreatment. The mean ± SD change in pupil area was -0.03 ± 2.12 mm2. There were no statistically significant changes between preoperative and post-laser pupil areas (P = 0.93, 95% CI: -0.71 to 0.65). Comparisons within subgroups also did not detect pupil area reduction.


Conclusion: This study did not detect statistically significant changes in pupil area after laser pretreatment using low-energy FLACS. This observation is in contrast to previous studies using other laser platforms.

Keywords:

Cataract Surgery; Femtosecond Laser; Pupil Size; Safety

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