Photorefractive keratectomy for hyperopia in 800 eyes with the meditec MEL 60 laser

Z. Z. Nagy, R. R. Krueger, H. Hamberg-Nyström, A. Füst, A. Kovács, E. Kelemen, I. Süveges

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Abstract

PURPOSE: To evaluate the refractive results of 800 hyperopic eyes undergoing PRK treatment. METHODS: Eight hundred hyperopic eyes were treated with PRK. An Aesculap-Meditec MEL 60 scanning ArF excimer laser used. Treatment Group 1 consisted of eyes with a preoperative refractive error of +3.50 D or less (n = 482) and Group 2, of +3.75 D or more (n = 318). RESULTS: Preoperatively, Group 1 required an average correction of +2.88 ± 1.34 D and Group 2 required +5.64 ± 2.96 D. One year after PRK, average residual correction was +1.26 ± 1.24 D in Group 1, and in Group 2, +2.46 ± 1.84 D. In Group 1, uncorrected visual acuity (UCVA) was 20/40 or better in 88.4% (426/482); 20/20 or better in 75.7% (365); 2.1% (10/482) of eyes lost 2 lines, 2.1% (10/482) gained 2 lines; 3.1% (15/482) gained 2 or more lines of BSCVA; 74.4% (359/482) of eyes were within ±0.50 D of target correction and 84.8% (408/482) were within ±1.00 D. In Group 2, 47.5% (151/318) had UCVA of 20/40 or better; 34.2% (109/318) saw 20/20 or better uncorrected; 19.1% (61/318) lost 2 lines; 11.6% (37/318) lost 3 lines; none of the eyes gained 2 or more lines of BSCVA; 22.3% (71/318) were within ±0.50 D and 46.8% (149/318) were within ±1.00 D of target correction. Refractive stability was achieved after 6 months; a slight regression after 6 months was still observed. In Group 1, 10.5% (42/482) and in Group 2, 21.6% (69/318) complained of problems with daytime vision (glare and ghost image); during night-driving in Group 1, 17.6% (85/482) and in Group 2, 40.5% (129/318) had problems. CONCLUSION: PRK with the Aesculap-Meditec MEL 60 scanning ArF excimer laser offered the best long-term results with +3.50 D or less preoperative refractive error. With higher corrections, regression, decrease in BSCVA, and daytime visual problems were encountered.

Original languageEnglish
Pages (from-to)525-533
Number of pages9
JournalJournal of Refractive Surgery
Volume17
Issue number5
Publication statusPublished - Oct 6 2001

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology

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    Nagy, Z. Z., Krueger, R. R., Hamberg-Nyström, H., Füst, A., Kovács, A., Kelemen, E., & Süveges, I. (2001). Photorefractive keratectomy for hyperopia in 800 eyes with the meditec MEL 60 laser. Journal of Refractive Surgery, 17(5), 525-533.