Long-term refractive outcomes and stability after excimer laser surgery for myopia

Dirani, Mohamed and Couper, Terry and Yau, Joanne and Ang, Enk K. and Islam, F. M. Amirul and Snibson, Grant R. and Vajpayee, Rasik B. and Baird, Paul N. (2010) Long-term refractive outcomes and stability after excimer laser surgery for myopia. Journal of Cataract and Refractive Surgery, 36 (10). pp. 1709-1717. ISSN 0886-3350

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Abstract

Purpose: To evaluate the long-term refractive outcomes of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for myopia. Setting: Centre for Eye Research Australia, Melbourne, Australia. Design: Comparative case series. Methods: Preoperative baseline refractions in eyes having PRK, LASIK, or both at 1 multisurgeon center were analyzed from patient databases. Two- to 13-year follow-up data were analyzed and compared with 1-month postoperative visual outcomes. Results: The study evaluated 389 eyes (229 patients). In the PRK group, the mean preoperative spherical equivalent (SE) was -4.05 diopters (D) ± 1.17 (SD) in eyes with low to moderate myopia and -7.97 ± 2.00 D in eyes with high myopia (P = .009) and in the LASIK group, -3.98 ± 1.27 D and -7.64 ± 1.66 D, respectively (P = .008). At the last visit, the mean SE in the PRK group was -0.64 ± 0.83 D in eyes with low to moderate myopia and -1.06 ± 1.74 D in eyes with high myopia (P = .73) and in the LASIK group, -0.33 ± 0.59 D and -0.63 ± 0.90 D, respectively (P = .68). At the end of the study, 45.9% of eyes with low to moderate myopia and 25.0% with high myopia in the PRK group and 64.8% and 37.3%, respectively, in the LASIK group were within ±0.50 D of the attempted correction. Conclusions: Laser refractive surgery effectively treated all levels of myopia. Refractive stability was achieved within 1 year postoperatively, with LASIK showing better stability than PRK for up to 6 to 9 years.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Not a free publication. Paper not held.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - Department of Maths and Computing
Date Deposited: 19 Jan 2012 07:27
Last Modified: 13 Feb 2012 00:17
Uncontrolled Keywords: clinical evaluation; eye refraction; intermethod comparison; keratomileusis; laser surgery; myopia; photorefractive keratectomy; postoperative period; treatment outcome; vision; visual acuity
Fields of Research (FOR2008): 10 Technology > 1004 Medical Biotechnology > 100402 Medical Biotechnology Diagnostics (incl. Biosensors)
11 Medical and Health Sciences > 1113 Ophthalmology and Optometry > 111303 Vision Science
11 Medical and Health Sciences > 1113 Ophthalmology and Optometry > 111302 Optical Technology
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970111 Expanding Knowledge in the Medical and Health Sciences
Identification Number or DOI: doi: 10.1016/j.jcrs.2010.04.041
URI: http://eprints.usq.edu.au/id/eprint/20591

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