The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK

The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK

Steven M Christiansen1, Marcus C Neuffer1, Shameema Sikder2, Rodmehr T Semnani1, Majid Moshirfar11John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2Wilmer Eye Institute, Johns Hopkins University, Baltimore, MA, USAPurpose: To evaluate visual outcomes in moderately myopic eyes with fl...

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Autores principales: Christiansen SM, Neuffer MC, Sikder S, Semnani RT, Moshirfar M
Formato: article
Lenguaje:EN
Publicado: Dove Medical Press 2012
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Ophthalmology
RE1-994
Acceso en línea:https://doaj.org/article/94efebca081243268ef39232fb36f3aa
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spelling oai:doaj.org-article:94efebca081243268ef39232fb36f3aa2021-12-02T01:13:41ZThe effect of preoperative keratometry on visual outcomes after moderate myopic LASIK1177-54671177-5483https://doaj.org/article/94efebca081243268ef39232fb36f3aa2012-03-01T00:00:00Zhttp://www.dovepress.com/the-effect-of-preoperative-keratometry-on-visual-outcomes-after-modera-a9531https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Steven M Christiansen1, Marcus C Neuffer1, Shameema Sikder2, Rodmehr T Semnani1, Majid Moshirfar11John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2Wilmer Eye Institute, Johns Hopkins University, Baltimore, MA, USAPurpose: To evaluate visual outcomes in moderately myopic eyes with flat and steep corneas (preoperatively) that have been treated with laser-assisted in situ keratomileusis (LASIK).Patients and methods: Records of ninety-six eyes with average preoperative keratometry (K) values between 39.9 and 42.0 diopters (D) (flat) were matched with 103 eyes with preoperative K values between 46.0 and 47.2 D (steep) that underwent LASIK between March 2007 and March 2010 for moderate myopia, and were retrospectively reviewed. The primary outcome measures used to determine the effect of preoperative keratometry on visual prognosis were refraction, visual acuity, change in keratometry (ΔK), and change in spherical equivalent (ΔSE), measured at 1, 3, 6, and 12 months postoperatively.Results: Significant differences were found at 6 months postoperatively between the flat group and steep group in SE (P = 0.029), sphere (P = 0.018), ΔK (P = 0.002), percentage of eyes achieving SE of −0.25 to + 0.25 D (P = 0.0125), −0.26 to −0.50 D (P = 0.003), −0.51 to −1.00 D (P = 0.044), and the percentage of eyes achieving uncorrected distance visual acuity of 20/15 or better (P = 0.0006).Conclusion: Moderately myopic eyes with flatter corneas preoperatively have better visual prognosis following LASIK compared with moderately myopic eyes with steeper corneas.Keywords: keratometry, cornea, LASIK, refractive surgeryChristiansen SMNeuffer MCSikder SSemnani RTMoshirfar MDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2012, Iss default, Pp 459-464 (2012)
institution DOAJ
collection DOAJ
language EN
topic Ophthalmology
RE1-994
spellingShingle Ophthalmology
RE1-994
Christiansen SM
Neuffer MC
Sikder S
Semnani RT
Moshirfar M
The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
description Steven M Christiansen1, Marcus C Neuffer1, Shameema Sikder2, Rodmehr T Semnani1, Majid Moshirfar11John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2Wilmer Eye Institute, Johns Hopkins University, Baltimore, MA, USAPurpose: To evaluate visual outcomes in moderately myopic eyes with flat and steep corneas (preoperatively) that have been treated with laser-assisted in situ keratomileusis (LASIK).Patients and methods: Records of ninety-six eyes with average preoperative keratometry (K) values between 39.9 and 42.0 diopters (D) (flat) were matched with 103 eyes with preoperative K values between 46.0 and 47.2 D (steep) that underwent LASIK between March 2007 and March 2010 for moderate myopia, and were retrospectively reviewed. The primary outcome measures used to determine the effect of preoperative keratometry on visual prognosis were refraction, visual acuity, change in keratometry (ΔK), and change in spherical equivalent (ΔSE), measured at 1, 3, 6, and 12 months postoperatively.Results: Significant differences were found at 6 months postoperatively between the flat group and steep group in SE (P = 0.029), sphere (P = 0.018), ΔK (P = 0.002), percentage of eyes achieving SE of −0.25 to + 0.25 D (P = 0.0125), −0.26 to −0.50 D (P = 0.003), −0.51 to −1.00 D (P = 0.044), and the percentage of eyes achieving uncorrected distance visual acuity of 20/15 or better (P = 0.0006).Conclusion: Moderately myopic eyes with flatter corneas preoperatively have better visual prognosis following LASIK compared with moderately myopic eyes with steeper corneas.Keywords: keratometry, cornea, LASIK, refractive surgery
format article
author Christiansen SM
Neuffer MC
Sikder S
Semnani RT
Moshirfar M
author_facet Christiansen SM
Neuffer MC
Sikder S
Semnani RT
Moshirfar M
author_sort Christiansen SM
title The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
title_short The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
title_full The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
title_fullStr The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
title_full_unstemmed The effect of preoperative keratometry on visual outcomes after moderate myopic LASIK
title_sort effect of preoperative keratometry on visual outcomes after moderate myopic lasik
publisher Dove Medical Press
publishDate 2012
url https://doaj.org/article/94efebca081243268ef39232fb36f3aa
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