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An Epithelial Abrasion Model for Studying Corneal Wound Healing
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Published on: December 29, 2021

Epithelial responses to rubbing-related mechanical forces.

Charles W McMonnies1, Ahmed Alharbi, Gavin C Boneham

  • 1School of Optometry and Vision Science, University of New South Wales, Kensington, Australia. c.mcmonnies@unsw.edu.au

Cornea
|August 11, 2010
PubMed
Summary

Eye rubbing causes significant corneal epithelial thinning due to mechanical trauma. Epithelial thickness recovers within 45 minutes, but rubbing may affect eye measurement accuracy.

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Area of Science:

  • Ophthalmology
  • Corneal Physiology
  • Biomechanical Engineering

Background:

  • Eye rubbing is a common behavior with potential biomechanical effects on the cornea.
  • Understanding these effects is crucial for interpreting ophthalmic measurements.

Purpose of the Study:

  • To quantify changes in corneal epithelial thickness following eye rubbing.
  • To investigate the recovery time course of epithelial thickness after rubbing.

Main Methods:

  • Used optical pachometry to measure corneal thickness in 12 subjects.
  • Assessed central and midperipheral epithelial thickness before and after 15 seconds of rubbing.
  • Monitored thickness recovery at 15-minute intervals.

Main Results:

  • A statistically significant 18.4% reduction in epithelial thickness was observed immediately after rubbing.
  • Epithelial thickness recovered to baseline within 15-30 minutes centrally and 30-45 minutes mid-peripherally.

Conclusions:

  • Light to moderate eye rubbing induces significant mechanical trauma to the corneal epithelium.
  • Potential mechanisms for thinning include cell flattening and displacement of cellular components and water.
  • Eye rubbing can interfere with accurate ophthalmic diagnostic measurements.