Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK

Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK

Mostafa A El-Helw, Ahmed M EmarahCairo University, Cairo, EgyptObjective: We undertook a prospective nonrandomized study to assess refractive outcome and patient satisfaction with hyperopic laser in situ keratomileusis (LASIK) using variable optical zone diameters in correction of hyperopia of more...

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Autores principales: Mostafa A El-Helw, Ahmed M Emarah
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Lenguaje:EN
Publicado: Dove Medical Press 2010
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Ophthalmology
RE1-994
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spelling oai:doaj.org-article:0ce14f9bad55441087750f34ecee059c2021-12-02T01:33:42ZPredictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK1177-54671177-5483https://doaj.org/article/0ce14f9bad55441087750f34ecee059c2010-05-01T00:00:00Zhttp://www.dovepress.com/predictability-and-stability-of-refraction-with-increasing-optical-zon-a4417https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Mostafa A El-Helw, Ahmed M EmarahCairo University, Cairo, EgyptObjective: We undertook a prospective nonrandomized study to assess refractive outcome and patient satisfaction with hyperopic laser in situ keratomileusis (LASIK) using variable optical zone diameters in correction of hyperopia of more than 4.00 diopters.Methods: Fourteen adults (comprising 28 hyperopic eyes) underwent hyperopic LASIK correction for hyperopia of more than 4.00 diopters. The sample was divided into two groups. Group 1 included the right eyes of the 14 patients who underwent hyperopic LASIK using a 6.5 mm optical zone diameter. Group 2 comprised the left eyes of the same patients with the only difference being that the optical zone diameter was 6.0 mm.Results: The mean age of the patients was 36.42 ± 5.10 years. Group 1 eyes had a median (range) preoperative uncorrected visual acuity (UCVA) of 0.79 (0.52) and best-corrected visual acuity (BCVA) of 0.15 (0.08). Group 2 had a median preoperative UCVA of 0.79 (0.60) and BCVA of 0.15 (0.08). The median postoperative UCVA in Group 1 was 0.17 (0.21) and BCVA was 0.15 (0.13). In Group 2, the median postoperative UCVA was 0.30 (0.32) and BCVA was 0.15 (0.26). Group 1 had a median preoperative refraction of +5.37 (1.75) diopters and the median postoperative refraction at one week was −0.23 (1.25) diopters, at three months was +0.75 (0.75) diopters, and at six months was +0.75 (1.00) diopters. Group 2 had a median preoperative refraction of +5.00 (1.75) diopters, and the median postoperative refraction at one week was +0.13 (1.5) diopters, at three months was +1.00 (0.75) diopters and at six months +1.25 (1.25) diopters. The difference was statistically significant between groups 1 and 2. The difference within each group was also significant. Group 1 eyes were stabilizing after the three-month period in contrast with Group 2 in which the refractive changes continued throughout the follow-up period.Conclusion: Larger optical zone diameter in correction of hyperopia of more than 4.00 diopters was more predictable, stable and safe.Keywords: hyperopia, LASIK, optical zone, refraction Mostafa A El-HelwAhmed M EmarahDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2010, Iss default, Pp 455-458 (2010)
institution DOAJ
collection DOAJ
language EN
topic Ophthalmology
RE1-994
spellingShingle Ophthalmology
RE1-994
Mostafa A El-Helw
Ahmed M Emarah
Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
description Mostafa A El-Helw, Ahmed M EmarahCairo University, Cairo, EgyptObjective: We undertook a prospective nonrandomized study to assess refractive outcome and patient satisfaction with hyperopic laser in situ keratomileusis (LASIK) using variable optical zone diameters in correction of hyperopia of more than 4.00 diopters.Methods: Fourteen adults (comprising 28 hyperopic eyes) underwent hyperopic LASIK correction for hyperopia of more than 4.00 diopters. The sample was divided into two groups. Group 1 included the right eyes of the 14 patients who underwent hyperopic LASIK using a 6.5 mm optical zone diameter. Group 2 comprised the left eyes of the same patients with the only difference being that the optical zone diameter was 6.0 mm.Results: The mean age of the patients was 36.42 ± 5.10 years. Group 1 eyes had a median (range) preoperative uncorrected visual acuity (UCVA) of 0.79 (0.52) and best-corrected visual acuity (BCVA) of 0.15 (0.08). Group 2 had a median preoperative UCVA of 0.79 (0.60) and BCVA of 0.15 (0.08). The median postoperative UCVA in Group 1 was 0.17 (0.21) and BCVA was 0.15 (0.13). In Group 2, the median postoperative UCVA was 0.30 (0.32) and BCVA was 0.15 (0.26). Group 1 had a median preoperative refraction of +5.37 (1.75) diopters and the median postoperative refraction at one week was −0.23 (1.25) diopters, at three months was +0.75 (0.75) diopters, and at six months was +0.75 (1.00) diopters. Group 2 had a median preoperative refraction of +5.00 (1.75) diopters, and the median postoperative refraction at one week was +0.13 (1.5) diopters, at three months was +1.00 (0.75) diopters and at six months +1.25 (1.25) diopters. The difference was statistically significant between groups 1 and 2. The difference within each group was also significant. Group 1 eyes were stabilizing after the three-month period in contrast with Group 2 in which the refractive changes continued throughout the follow-up period.Conclusion: Larger optical zone diameter in correction of hyperopia of more than 4.00 diopters was more predictable, stable and safe.Keywords: hyperopia, LASIK, optical zone, refraction
format article
author Mostafa A El-Helw
Ahmed M Emarah
author_facet Mostafa A El-Helw
Ahmed M Emarah
author_sort Mostafa A El-Helw
title Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
title_short Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
title_full Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
title_fullStr Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
title_full_unstemmed Predictability and stability of refraction with increasing optical zone diameter in hyperopic LASIK
title_sort predictability and stability of refraction with increasing optical zone diameter in hyperopic lasik
publisher Dove Medical Press
publishDate 2010
url https://doaj.org/article/0ce14f9bad55441087750f34ecee059c
work_keys_str_mv AT mostafaaelhelw predictabilityandstabilityofrefractionwithincreasingopticalzonediameterinhyperopiclasik
AT ahmedmemarah predictabilityandstabilityofrefractionwithincreasingopticalzonediameterinhyperopiclasik
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