Physical problems of excimer laser cornea ablation

Zsolt Bor; Bela Hopp; Bela Racz; Gabor Szabo; Zsuzsanna Marton; Imola Ratkay; Judit Mohay; Ildiko Sueveges; Agnes Fuest

doi:10.1117/12.145357

1 October 1993 Physical problems of excimer laser cornea ablation

Zsolt Bor, Bela Hopp, Bela Racz, Gabor Szabo, Zsuzsanna Marton, Imola Ratkay, Judit Mohay, Ildiko Sueveges, Agnes Fuest

Author Affiliations +

Optical Engineering, 32(10), (1993). https://doi.org/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.

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Zsolt Bor, Zsolt Bor, Bela Hopp, Bela Hopp, Bela Racz, Bela Racz, Gabor Szabo, Gabor Szabo, Zsuzsanna Marton, Zsuzsanna Marton, Imola Ratkay, Imola Ratkay, Judit Mohay, Judit Mohay, Ildiko Sueveges, Ildiko Sueveges, Agnes Fuest, Agnes Fuest, } "Physical problems of excimer laser cornea ablation," Optical Engineering 32(10), (1 October 1993). https://doi.org/10.1117/12.145357 . Submission:

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