Intraocular enhancement of pressure transients induced by argon-fluoride laser pulses during photorefractive keratectomy

Roberto Pini; Francesca Rossi; Salvatore Siano; Renzo Salimbeni; Pier Giorgio Gobbi

doi:10.1117/12.297838

22 December 1997 Intraocular enhancement of pressure transients induced by argon-fluoride laser pulses during photorefractive keratectomy

Roberto Pini, Francesca Rossi, Salvatore Siano, Renzo Salimbeni, Pier Giorgio Gobbi

Author Affiliations +

Proceedings Volume 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy; (1997) https://doi.org/10.1117/12.297838
Event: BiOS Europe '97, 1997, San Remo, Italy

Abstract

Pulsed laser ablation of corneal tissue at the typical operative fluences of Argon-Fluoride photorefractive keratectomy produces stress waves propagating into the eye. Temporal and spatial evolution of these pressure pulses during propagation were measured directly in porcine eyes with a needle hydrophone. Beside diffraction effects that give rise to a bipolar shape of the pressure pulse with a positive compression peak followed by a marked rarefaction phase, we found a significant focusing of the stress wavefront caused by the spherical shape of the cornea, that increased for larger irradiation spot diameters.

Citation Download Citation

Roberto Pini, Francesca Rossi, Salvatore Siano, Renzo Salimbeni, and Pier Giorgio Gobbi "Intraocular enhancement of pressure transients induced by argon-fluoride laser pulses during photorefractive keratectomy", Proc. SPIE 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy, (22 December 1997); https://doi.org/10.1117/12.297838

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