Collagen treatment apparatus
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United States of America Patent
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Apr 8, 1997
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Sep 27, 1985
priority date (Note) -
Expired
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Abstract
A method and apparatus for controlled thermal shrinkage of collagen tissue by irradiation with coherent energy in the wavelength band of 1.80 to 2.55 microns as generated by a laser. A specific application to ophthalmological corneal reshaping is described. A method for shrinkage of collagen tissue by application of coherent infrared energy, in which the threshold shrinkage temperature is substantially reduced by application of a reagent such as lysozyme to the tissue prior to heating. The method is especially useful in ophthalmology for shape modification of a cornea, and is enhanced by using a corneal collagen shield as a carrier and delivery agent for the reagent and an admixed anaesthetic.
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