January 1989
Volume 30, Issue 1
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Articles  |   January 1989
Corneal surface ablation by 193 nm excimer laser and wound healing in rabbits.
Author Affiliations
  • R N Gaster
    Department of Ophthalmology, University of California, Irvine 92717.
  • P S Binder
    Department of Ophthalmology, University of California, Irvine 92717.
  • K Coalwell
    Department of Ophthalmology, University of California, Irvine 92717.
  • M Berns
    Department of Ophthalmology, University of California, Irvine 92717.
  • R C McCord
    Department of Ophthalmology, University of California, Irvine 92717.
  • N L Burstein
    Department of Ophthalmology, University of California, Irvine 92717.
Investigative Ophthalmology & Visual Science January 1989, Vol.30, 90-98. doi:
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    • Get Citation

      R N Gaster, P S Binder, K Coalwell, M Berns, R C McCord, N L Burstein; Corneal surface ablation by 193 nm excimer laser and wound healing in rabbits.. Invest. Ophthalmol. Vis. Sci. 1989;30(1):90-98.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The 193 nm argon fluoride excimer laser was used to ablate a 6 mm diameter area of the central rabbit cornea under various conditions of power, beam configuration and exposure time. High repetition rates or prolonged exposures produced charring and prevented rapid epithelial wound closure. Endothelial vacuolization, reduction in density, and displacement of cell material into Descemet's layer resulted in these experiments. A beam of low and uniform power intensity (40 pulses per second, 100 seconds at 23 mJ/cm2) reduced stromal damage, cellular infiltration, and epithelial irregularities including punctate staining and cell exfoliation. Epithelial rehealing occurred within two days. Basal lamina and hemidesmosomes were reformed by one week. Endothelial damage was not detected. Excimer laser ablation may allow removal of superficial dystrophies or scars, followed by rapid healing from normal corneal reparative processes.

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