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Jorge E. Valdez, Marcos E. Garza-Madrid, Rosa E. Martinez-Muñoz, Carlos Gomez-Alonso; Risk Factors for Retreatment after LASIK: 3 Year Follow Up in a Hispanic Population. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5786.
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To asses the correlation of some common, although disputed, risk factors for LASIK retreatment in a Hispanic population in Monterrey N.L. México, with a 3 year follow up.
A retrospective analysis was performed on 482 LASIK procedures on 241 Hispanic patients at the Centro de Diagnóstico y Tratamiento Láser en Oftalmología, Hospital San José-Tec de Monterrey (México). Surgeries were performed between January 2005 and July 2007. Inclusion criteria were: age over 18 years; stable refraction within a range of -11.0oD to 6.50D, with a cylindrical component between 0.00D and 6.50D; visual acuity of 20/20 to 20/800 and 36 month follow up. Patients with keratoconus, previous eye surgery and eye trauma were excluded. Retreatment was defined as a second LASIK procedure due to residual refractive error or patient’s insatisfaction with the achieved visual acuity. Procedures were performed by the same surgeon with a Technolas-217 Excimer Workstation (Technolas Perfect Vision GmbH, München, Germany), Hansatome Microkeratome (Bausch & Lomb, Rochester, NY) and blepharostate. Statistical analysis was performed with the SPSS software for windows.
Visual acuity after the primary procedure was equal to or better than 20/40 in 81.1% of patients and 20/20 in 72.2%. Retreatment was performed in 33(6.85%) of procedures. Of these 15 (45.5%) had myopia, 17 (51.5%) hyperopia and 1(3%) astigmatism. Although the majority of re-treated patients had hyperopia, the difference was not statistically significant. On a Chi squared hypothesis testing, age was found to be statistically related with retreatment (α=0.05). Our results also show a trend for patients with Myopia >3.0D to be in greater risk for retreatment (p=0.08). Post-treatment acuity had no effect on the risk for re-treatment (p=0.99).
Although we had a small sample of retreated patients our results suggest that, in our Hispanic population, age, moderate or severe myopia and possibly hyperopia could be risk factors for LASIK retreatment.
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