1 October 1993 Physical problems of excimer laser cornea ablation
Author Affiliations +
Optical Engineering, 32(10), (1993). doi:10.1117/12.145357
Abstract
ArF excimer laser ablation of corneal tissues (in vitro, pig) is investigated. Scanning electron microscopic analysis shows that the spatial resolution of the ablation is better than 1 μm. The etching rate and etched depth is found to be proportional to the logarithm of the laser fluence and the number of shots, respectively. To investigate the dynamic processes a laser-based, ultrafast photographic arrangement was constructed having a temporal resolution of 1 ns. The maximum speed of the shock wave generated during ablation is found to be as high as 4000 m/s. The ejection of the ablation plume with plume-front velocities in the range of 600 m/s is also observed. A new type of surface wave generated by the recoil forces of the ablated material is found. The amplitude of this surface wave can be as high as 0.4 mm.
Zsolt Bor, Bela Hopp, Bela Racz, Gabor Szabo, Zsuzsanna Marton, Imola Ratkay, Judit Mohay, Ildiko Sueveges, Agnes Fuest, "Physical problems of excimer laser cornea ablation," Optical Engineering 32(10), (1 October 1993). http://dx.doi.org/10.1117/12.145357
JOURNAL ARTICLE
6 PAGES


SHARE
KEYWORDS
Laser ablation

Cornea

Excimer lasers

Eye

Etching

Photography

Wave propagation

Back to Top