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Early flap displacement after LASIK.

Gerry Clare1, Tara C B Moore, Claire Grills

  • 1University of California San Francisco, Department of Ophthalmology, 10 Koret Way, K-301, San Francisco, CA 94143, USA.

Ophthalmology
|May 10, 2011
PubMed
Summary
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The risk of flap displacement after LASIK surgery is very low (0.012%). Hyperopic eyes and microkeratome use increase the risk of early flap displacement (EFD).

Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Laser Vision Correction

Background:

  • LASIK is a common refractive surgery.
  • Flap displacement is a rare complication.
  • Understanding risk factors is crucial for patient safety.

Purpose of the Study:

  • To evaluate the incidence and risk factors of flap displacement after LASIK.
  • To compare flap displacement rates between microkeratome and femtosecond laser techniques.

Main Methods:

  • Retrospective case series of 41,845 adults (81,238 eyes).
  • Analysis of flap displacements over a ≥12-month follow-up period.
  • Logistic regression used to identify risk factors for early flap displacement (EFD).

Main Results:

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  • Overall incidence of flap displacement was 0.012% (10/81,238 eyes).
  • Hyperopic eyes had a significantly higher risk (0.055%) compared to myopic eyes (0.003%).
  • Microkeratome surgery had a higher incidence of EFD (0.033%) than femtosecond laser (0.003%), especially in hyperopes.

Conclusions:

  • LASIK flap displacement is extremely rare.
  • Hyperopia is a significant risk factor for EFD.
  • Femtosecond laser appears to have a lower risk of EFD compared to microkeratome, particularly in hyperopic patients.