Thermal modeling of laser photothermo keratoplasty

Zhiping James Zhou; Qiushi Ren; Gabriel Simon; Jean-Marie A. Parel

doi:10.1117/12.137405

14 August 1992 Thermal modeling of laser photothermo keratoplasty

Zhiping James Zhou, Qiushi Ren, Gabriel Simon, Jean-Marie A. Parel

Proceedings Volume 1644, Ophthalmic Technologies II; (1992) https://doi.org/10.1117/12.137405
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

Laser photo thermo keratoplasty (LPTK) is a refractive procedure that changes the curvature of the cornea by laser induced collagen shrinkage. To understand the temperature distribution induced by the laser radiation inside the cornea, a photo-thermal theoretical model is employed to simulate this process. The 4-D space-time temperature distributions within the cornea are calculated and depicted. The effects of the incident fluence and the laser spot size on temperature relaxation rate is discussed. Optimization of incident fluence on the surface of the cornea is made. The comparison between calculated and experimental regions of collagen shrinkage is given. Recommendations for the design of clinical surgery instruments are also presented.

Citation Download Citation

Zhiping James Zhou, Qiushi Ren, Gabriel Simon, and Jean-Marie A. Parel "Thermal modeling of laser photothermo keratoplasty", Proc. SPIE 1644, Ophthalmic Technologies II, (14 August 1992); https://doi.org/10.1117/12.137405

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