Abstract
This paper presents a study of the optical properties of the components of the stroma
of the human cornea in the wavelength range 190-250nm. It is shown that absorption of 223-nm radiation by the corneal fluid is a factor of 20 less than of 193-nm radiation. Because of this effect, the rate and efficiency of ablation of
the cornea is about a factor 2 greater for laser radiation with a wavelength of 223nm than for 193-nm radiation. The temperature on the surface of the cornea has been measured
when radiation with wavelengths 193 and 223nm is acting on it. It was found that the relative temperature increase on
the surface of the cornea during ablation by wavelength 193nm was 11°C, and during ablation at 223nm only 5°C for identical parameters of operation and laser radiation. It is shown
that 223-nm radiation is preferable for performing refractive operations, as having a
number of advantages over the traditionally used 193-nm radiation.
© 2009 Optical Society of America
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