Features of Laser-Induced Modification of Sclera and Cornea |
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Authors: | N Yu Ignat’eva O L Zakharkina A R Dadasheva A R Sadekova V N Bagratashvili V V Lunin |
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Institution: | 1.Department of Chemistry,Moscow State University,Moscow,Russia;2.FNITs Crystallography and Photonics,Russian Academy of Sciences,Moscow,Russia;3.Moscow State University (Baku Branch),Baku,Azerbaijan |
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Abstract: | Results are presented from studying collagen degradation in scleral and corneal tissues upon CW IR laser irradiation at a wavelength of 1.56 μm and powers of 1.4 and 7 W. The exposure time is such that the radiometrically determined maximum tissue temperature ranges from 55 to 70°C. It is shown that at a power of 1.4 W, laser-induced collagen denaturation in sclera and cornea starts at 55 and 60°C, respectively. When the power is increased to 7 W, the temperature of denaturation onset rises by 2°C. These findings are discussed from the viewpoint of the joint photothermal and photomechanical effects of laser irradiation. |
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