Corneal reshaping using a pulsed UV solid-state laser

Qiushi Ren; Gabriel Simon; Jean-Marie A. Parel; Jin-Hui Shen; Yoshiko Takesue M.D.

doi:10.1117/12.147560

24 June 1993 Corneal reshaping using a pulsed UV solid-state laser

Qiushi Ren, Gabriel Simon, Jean-Marie A. Parel, Jin-Hui Shen, Yoshiko Takesue M.D.

Proceedings Volume 1877, Ophthalmic Technologies III; (1993) https://doi.org/10.1117/12.147560
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Replacing the gas ArF (193 nm) excimer laser with a solid state laser source in the far-UV spectrum region would eliminate the hazards of a gas laser and would reduce its size which is desirable for photo-refractive keratectomy (PRK). In this study, we investigated corneal reshaping using a frequency-quintupled (213 nm) pulsed (10 ns) Nd:YAG laser coupled to a computer-controlled optical scanning delivery system. Corneal topographic measurements showed myopic corrections ranging from 2.3 to 6.1 diopters. Post-operative examination with the slit-lamp and operating microscope demonstrated a smoothly ablated surface without corneal haze. Histological results showed a smoothly sloping surface without recognizable steps. The surface quality and cellular effects were similar to that of previously described excimer PRK. Our study demonstrated that a UV solid state laser coupled to an optical scanning delivery system is capable of reshaping the corneal surface with the advantage of producing customized, aspheric corrections without corneal haze which may improve the quality of vision following PRK.

Citation Download Citation

Qiushi Ren, Gabriel Simon, Jean-Marie A. Parel, Jin-Hui Shen, and Yoshiko Takesue M.D. "Corneal reshaping using a pulsed UV solid-state laser", Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); https://doi.org/10.1117/12.147560

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