Experimental investigation on acoustic phenomena induced inside the eyeball by excimer laser ablation of the cornea

Year: 1996

Authors: Pini Roberto, Rossi F., Salimbeni Renzo, Siano S., Vannini Matteo, Carones Francesco, Trabucchi Giuseppe, Brancato Rosario, Gobbi Pier Giorgio

Autors Affiliation: Istituto di Elettronica, Quantistica/CNR, Firenze, Italy

Abstract: In this work we studied the propagation of the acoustic wave generated during laser keratectomy with a clinical ArF laser source. In vitro measurements of the temporal pressure profiles induced inside the ocular bulb were performed on porcine eyes with a fast risetime needle hydrophone introduced into the eyeball. Peak pressure values as high as 90 bars have been measured at a laser fluence of 180 mJ/cm 2, depending on the diameter of the irradiation spot and on the distance from the surface of the cornea.

Conference title:

KeyWords: Cornea; Eyeballs; Temporal pressure profiles, Ablation; Acoustic wave effects; Excimer lasers; Gas lasers; Hydrophones; Laser applications; Medical imaging; Pressure measurement, Ophthalmology
DOI: 10.1117/12.229584