January 1989
Volume 30, Issue 1
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Articles  |   January 1989
Femtosecond optical ranging of corneal incision depth.
Author Affiliations
  • D Stern
    Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
  • W Z Lin
    Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
  • C A Puliafito
    Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
  • J G Fujimoto
    Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
Investigative Ophthalmology & Visual Science January 1989, Vol.30, 99-104. doi:
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    • Get Citation

      D Stern, W Z Lin, C A Puliafito, J G Fujimoto; Femtosecond optical ranging of corneal incision depth.. Invest. Ophthalmol. Vis. Sci. 1989;30(1):99-104.

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

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Abstract

Excimer laser ablation has been proposed as a technique for keratorefractive surgery. Clinical acceptance of linear-incision laser keratectomy may depend on the availability of a method for accurately and noninvasively monitoring incision depth during the ablation process. We have developed a femto-second optical ranging technique for measurement of corneal incision depth. This technique uses nonlinear optical cross-correlation to determine the time-of-flight of an ultrashort laser pulse between the anterior corneal surface and the bottom of the keratectomy incision. Longitudinal and transverse resolution are estimated to be 5 micron and 10 micron, respectively.

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