Abstract

BARREIRO, Telma Pereira et al. Wavefront-Guided Lasik for low to moderate myopia: CustomCornea^® versus Zyoptix^®. Arq. Bras. Oftalmol. [online]. 2009, vol.72, n.4, pp. 519-525. ISSN 0004-2749.  http://dx.doi.org/10.1590/S0004-27492009000400016.

PURPOSE: To compare the visual and clinical outcomes of Wavefront-guided laser in situ keratomileusis (Lasik) with Alcon CustomCornea^® and Zyoptix^® systems. METHODS: A prospective, randomized, masked and bilateral study was conducted. Fifty patients with preoperative spherical equivalent ranging from -1.00 to -6.50 D were enrolled for customized ablation in both eyes. All of them were submitted to Lasik CustomCornea^® treatment in one eye and Zyoptix^® in the other eye. Uncorrected visual acuity, best correct visual acuity (BCVA), manifest refraction, wavefront measurements, and contrast sensitivity testing were performed preoperatively and postoperatively at 1, 3 and 6 months. RESULTS: Preoperatively manifest refractive spherical equivalent was -3.29 ± 1.56 D in the CustomCornea^® group and -3.22 ± 1.50 D in the Zyoptix^® group. At 6 months, 86% of CustomCornea^® eyes and 70% of Zyoptix^® eyes had UCVA > 20/20. One hundred percent of the CustomCornea^® group and 88% of the eyes in the Zyoptix^® were within 0.50 D of emmetropia. In both groups, the contrast sensitivity improved. Spherical aberration increased in both groups, with the CustomCornea^® group showing lower levels (p<0,001). CONCLUSION: There were no differences between the systems according to safety and effectiveness. The Zyoptix^® platform showed greater spherical aberration.

Keywords : Myopia [surgery]; Keratomileusis, laser in situ [methods]; Refractive errors [surgery]; Comparative studies.