Evaluation of some technical factors affecting surgical outcome in photorefractive keratectomy with the VISX 2020 excimer laser

Ezra I. Maguen M.D.; James J. Salz M.D.; Thanassis Papaioannou; Anthony B. Nesburn M.D.

doi:10.1117/12.209858

22 May 1995 Evaluation of some technical factors affecting surgical outcome in photorefractive keratectomy with the VISX 2020 excimer laser

Ezra I. Maguen M.D., James J. Salz M.D., Thanassis Papaioannou, Anthony B. Nesburn M.D.

Author Affiliations +

Proceedings Volume 2393, Ophthalmic Technologies V; (1995) https://doi.org/10.1117/12.209858
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

Some technical factors relating to the use of the VISX model 20/20 excimer laser for photorefractive keratectomy will be discussed and the way they affect the final optical correction will be demonstrated, as follows: (1) Discontinuation of nitrogen flow: improved corneal haze but induced a mean undercorrection of 0.8 D, 18 months postoperatively. (2) Discontinuation of the use of the fixation ring did not affect centration in a statistically significant fashion. (3) Enlargement of the optical from 5.0 mm to 6.0 mm zone did not affect the refractive outcome. Visual acuity was improved in eyes which had PRK done with a 6.0 mm optical zone.

Citation Download Citation

Ezra I. Maguen M.D., James J. Salz M.D., Thanassis Papaioannou, and Anthony B. Nesburn M.D. "Evaluation of some technical factors affecting surgical outcome in photorefractive keratectomy with the VISX 2020 excimer laser", Proc. SPIE 2393, Ophthalmic Technologies V, (22 May 1995); https://doi.org/10.1117/12.209858

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