Comparison of retina damage thresholds simulating the femtosecond-laser in situ keratomileusis (fs-LASIK) process with two laser systems in the CW- and fs-regime |
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Authors: | Sander M Minet O Zabarylo U Müller M Tetz M R |
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Institution: | 1.Berlin Eye Research Institute, Alt Moabit 98/99, 10559, Berlin, Germany ;2.Charité Centrum 6, AG Medizinische Physik/Optische Diagnostik, Fabeckstr. 60-62, 14195, Berlin, Germany ;3.Augenklinik Ahaus, Am Schlögraben 13, 48683, Ahaus, Germany ; |
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Abstract: | The femtosecond-laser in situ keratomileusis procedure affords the opportunity to correct ametropia by cutting transparent
corneal tissue with ultra-short laser pulses. Thereby the tissue cut is generated by a laser-induced optical breakdown in
the cornea with ultra-short laser pulses in the near-infrared range. Compared to standard procedures such as photorefractive
keratectomy and laser in-situ keratomileusis with the excimer laser, where the risk potential for the eye is low due to the
complete absorption of ultraviolet irradiation from corneal tissue, only a certain amount of the pulse energy is deposited
in the cornea during the fs-LASIK process. The remaining energy propagates through the eye and interacts with the retina and
the strong absorbing tissue layers behind. The objective of the presented study was to determine and compare the retina damage
thresholds during the fs-LASIK process simulated with two various laser systems in the CW- and fs-regime. |
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