12 January 1995 Model for photorefractive keratectomy with a scanning beam
Author Affiliations +
Proceedings Volume 2330, Lasers in Ophthalmology II; (1995) https://doi.org/10.1117/12.199254
Event: International Symposium on Biomedical Optics Europe '94, 1994, Lille, France
Abstract
The optimal values of the parameters of a scanning system for laser corneal surgery are determined by using a computer model. The correction of myopia is simulated. The accuracy of the correction, the smoothness of the corneal surface after ablation, and the time needed for surgery are computed. With a beam diameter of 0.5 mm, an overlap of 60% to 80%, and a 5 mm diameter treatment zone, the simulated error is less than 0.1 Diopter for a correction of 6 Diopters or less; the roughness is less than 7% of the central ablation depth; the number of pulses per Diopter of correction is 2500 if the beam intensity distribution is Gaussian and 580 if the beam intensity distribution is uniform.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fabrice Manns, Jin-Hui Shen, Per G. Soederberg, Takaaki Matsui, Jean-Marie A. Parel, "Model for photorefractive keratectomy with a scanning beam", Proc. SPIE 2330, Lasers in Ophthalmology II, (12 January 1995); doi: 10.1117/12.199254; https://doi.org/10.1117/12.199254
PROCEEDINGS
5 PAGES


SHARE
Back to Top