Update on excimer laser photorefractive keratectomy (PRK) at Cedars-Sinai Medical Center: two-year experience

Ezra I. Maguen M.D.; James J. Salz M.D.; Cathy Warren; Thanassis Papaioannou; Anthony B. Nesburn M.D.; Jonathan I. Macy M.D.; John Hofbauer M.D.; Warren S. Grundfest M.D.

doi:10.1117/12.147512

24 June 1993 Update on excimer laser photorefractive keratectomy (PRK) at Cedars-Sinai Medical Center: two-year experience

Ezra I. Maguen M.D., James J. Salz M.D., Cathy Warren, Thanassis Papaioannou, Anthony B. Nesburn M.D., Jonathan I. Macy M.D., John Hofbauer M.D., Warren S. Grundfest M.D.

Author Affiliations +

Proceedings Volume 1877, Ophthalmic Technologies III; (1993) https://doi.org/10.1117/12.147512
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Our two year experience with excimer laser photorefractive keratectomy for the correction of myopia on 160 eyes of 128 patients is described. All eyes were treated with a VISX Twenty- Twenty excimer laser, with the following parameters: radiant exposure 160 mJ/cm², frequency 5 Hz, ablation zone diameter 5.0 to 5.5 mm, and stromal ablation rate 0.18 to 0.33 (mu) /pulse. A suction fixation ring was used in all cases either with nitrogen flow (79 eyes) or without nitrogen flow (81 eyes) across the cornea. Follow-up ranged from one month (152 eyes) to 24 months (12 eyes). The results are stable between 3 and 24 months with less than 0.25 D change in the mean postoperative spherical equivalents. In eyes with a follow-up of 6 to 24 months, 77% to 100% were 20/40 or better uncorrected, and 84% to 92% were corrected to within +/- 1 D of emmetropia. Further follow-up is needed to assess the long term safety and efficacy of the procedure.

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Ezra I. Maguen M.D., James J. Salz M.D., Cathy Warren, Thanassis Papaioannou, Anthony B. Nesburn M.D., Jonathan I. Macy M.D., John Hofbauer M.D., and Warren S. Grundfest M.D. "Update on excimer laser photorefractive keratectomy (PRK) at Cedars-Sinai Medical Center: two-year experience", Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); https://doi.org/10.1117/12.147512

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