Artículos de revistas
Efectos producidos por diferentes tipos de láser en córnea de cobayos: identificación de un láser capaz de provocar lesiones superficiales sin dejar cicatrices
Effects produced by different types of laser in cornea of Guinea pigs: Identification of a laser capable of producing superficial lesions without leaving scars
Suarez, Alicia Carmen; Suarez, Maria Fernanda; Crim, N.; Monti, R.; Urrets-Zavalía, J. A.; et al.; Efectos producidos por diferentes tipos de láser en córnea de cobayos: identificación de un láser capaz de provocar lesiones superficiales sin dejar cicatrices; Elsevier Science; Archivos de la Sociedad Española de Oftalmología; 90; 10; 10-2015; 458-466
Suarez, Alicia Carmen
Suarez, Maria Fernanda
Urrets-Zavalía, J. A.
Serra, H. M.
To evaluate the effects of four different types of lasers with different power and exposure time conditions in the cornea of normal guinea pigs. To determine which laser and conditions only damage the epithelium and superficial stroma and to study the kinetics of wound healing.Methods: Damage was induced in the cornea of guinea pigs using different powers and exposure times of 4 types of Laser: Argon, CO2, Diode and ND-Yag and such injuries were evaluated by biomicroscopy (BM) and optical microscopy. Corneas from other normal animals were exposed to Argon laser (350 mW, 0.3 seconds, 50 μm of diameter) and the induced alterations were studied at different times using BM, Optical Coherence Tomography (OCT) and Transmission Electron Microscopy (TEM).Results: Only Argon laser at 350 mW, 0.3 seconds, 50 μm of diameter produced epithelium and superficial stroma lesions. Some leukomas were observed by BM, and they disappeared by day 15. Corneal thickness measured by OCT decreased in the eyes treated with Argon laser, during the first week. By TEM, different ultra structural alterations in corneal epithelium and stroma were observed during the early days, which disappeared by day 15.Conclusions: It was possible to develop reproducibly corneal epithelium and anterior stroma injuries using Argon laser at 350 mW, 0.3seconds, 50 μm of diameter. In vivo and in vitro studies showed that injured corneas with these laser conditions did not leave irreversible microscopic or ultrastructural alterations.
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Variation in corneal asphericity in myopic patients undergoing refractive LASIK (laser-assisted in-situ keratomileusis) or LASEK (laser-assisted subepithelial keratomileusis) surgery Sánchez Rivera, Camila Andrea; Mayorga, Myriam Teresa
Laser-Induced Breakdown Spectroscopy (LIBS) analysis of laser processing in active crystal with nanosecond laser pulses Alvira, Fernando Carlos; Rodenas, Airan; Torchia, Gustavo Adrian (Soc Applied Spectroscopy, 2014-04)Laser-induced breakdown spectroscopy (LIBS) analysis is applied to study the ablation threshold and the main plasma features of active crystals used for laser processing with Nd3þ ions. The experiments were conducted by ...