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Related Experiment Videos

Corneal endothelial damage by air bubbles during phacoemulsification

E K Kim1, S M Cristol, D H Geroski

  • 1Department of Ophthalmology, Yonsei University, Seoul, Korea.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|January 1, 1997
PubMed
Summary

Air bubbles cause severe corneal endothelial damage during phacoemulsification. This injury, a surface tension phenomenon, results in a characteristic ring-shaped pattern of damage.

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Biophysics

Background:

  • Phacoemulsification is a common surgical procedure for cataract removal.
  • Damage to the corneal endothelium can lead to significant visual impairment.

Purpose of the Study:

  • To investigate the mechanism of corneal endothelial damage caused by air bubbles during phacoemulsification.
  • To characterize the morphological changes and time course of air bubble-induced injury.

Main Methods:

  • Experiments involved exposing rabbit and human corneas to air bubbles under various conditions, including simulated phacoemulsification and perfusion.
  • In vivo studies were conducted on anesthetized rabbits with intracameral air injection.
  • Corneal tissues were analyzed using fluorescence microscopy and electron microscopy.

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Main Results:

  • Intracameral air bubbles caused severe corneal endothelial injury within 20 seconds in ex vivo models.
  • In vivo injury in rabbits occurred more slowly and exhibited different morphology.
  • A distinct ring-shaped pattern of damage was observed.

Conclusions:

  • Air bubbles in intraocular fluids induce corneal endothelial damage primarily through a surface tension phenomenon.
  • This surface tension effect leads to a characteristic ring-shaped injury pattern.
  • Understanding this mechanism is crucial for preventing intraoperative complications during phacoemulsification.