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Session Title: LASIK
Session Date/Time: Wednesday 09/10/2013 | 08:00-10:30
Paper Time: 08:00
Venue: Auditorium (First Floor)
First Author: : F.Soria SPAIN
Co Author(s): : J. Alio P. Peńa-Garcia A. Vega-Estrada A. Abbouda
To evaluate the long term outcomes of Laser in Situ Keratomileusis (LASIK).
Vissum Corporación. Alicante (Spain)
his multicentrical, retrospective, consecutive interventional series of cases evaluated in the long-term follow-up (15 years), 45 eyes of 25 patients aged 49.6±10.2 years (35 to 72). Patients with myopia or hyperopia treated with LASIK, using VISX 20/20 excimer laser (Santa Clara, California, USA) and the automated Corneal Shaper microkeratome (Chiron Vision, Irvine, California USA). All patients were evaluated three months, one year, two years, five years, ten years and 15 years after surgery. The main outcomes measures were stability of the following parameters: refraction, corneal mean keratometry, topographical cylinder, uncorrected and corrected distance visual acuity (UDVA and CDVA). Postoperative complications were also evaluated.
Twelve eyes (26.67%) underwent retreatment because of overcorrection, regression or both. 9 of them (75%) were retreated before the first years of follow up and all of them before 5 years. Only one eye required two retreatments. At 15 years, the spherical equivalent of 20 of 45 eyes (44.4%) was within ±1.0D and 26 (57.8%) were within ±2.00D. The mean SE slightly, but significantly (p<0.05), decreased (myopic regression) over 15 years, with a mean myopic regression of -1.35±2.34. This corresponds to a myopic shift of 0.09±0.17D per year. A statistical significant increase was observed also in the mean keratometries (p<0.05). No significant changes were found in corneal astigmatism (p>0.05) but significant changes were found in refractive cylinder (p<0.05). No statistical significance differences were found in UDVA (p<0.05).
he long term results demonstrate that LASIK, is a safe and effective procedure although a slight myopic regression can happens with time. Therefore, in some cases, a retreatment will be needed. No major complications related to the surgery were found during the follow up.
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