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Related Experiment Videos

Tear volume and stability after LASIK.

Sudi Patel1, Jorge L Alió, Alberto Artola

  • 1Research and Development Department, Vissum/Instituto Oftalmologico de Alicante, Spain.

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|March 28, 2007
PubMed
Summary

Laser eye surgery (LASIK) does not significantly alter average tear volume or tear film stability. However, individual patient responses show considerable variability after the procedure.

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Ocular Surface Disease

Background:

  • Laser-Assisted In Situ Keratomileusis (LASIK) is a common refractive surgery.
  • Understanding the impact of LASIK on ocular surface parameters is crucial for patient outcomes.
  • Pre-existing dry eye conditions can influence post-LASIK tear film dynamics.

Purpose of the Study:

  • To evaluate changes in tear volume and tear film stability following LASIK surgery.
  • To assess the effect of LASIK on tear meniscus height and tear thinning time.
  • To identify potential variations in ocular surface response to LASIK.

Main Methods:

  • Videokeratography was used to measure tear meniscus height and tear thinning time.
  • Measurements were taken preoperatively and at 1, 3, and 6 months post-LASIK.

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  • Patients with pre-existing dry eye were excluded from the study.

    • Main Results:

    • LASIK did not result in statistically significant changes in average tear meniscus height.
    • On average, tear thinning time remained unaffected by LASIK surgery.
    • Significant individual variations in tear thinning time were observed in some patients, particularly those with shorter preoperative tear thinning times.

    Conclusions:

    • LASIK surgery generally maintains average tear meniscus height and tear film stability.
    • While average values remain stable, individual ocular surface responses to LASIK can vary significantly.
    • Further investigation into factors causing individual variability in post-LASIK tear film changes may be warranted.