Adjusted offset for high spherical aberration in wavefront-guided excimer laser correction for myopic refractive errors

• Autores: A. Villarrubia, G. Fuentes Páez, Gabriel Pérez Alcalá, E. Palacín Miranda, Javier Gersol, Alicia Navarro
• Localización: Journal of Emmetropia: Journal of Cataract, Refractive and Corneal Surgery, ISSN-e 2171-4703, Vol. 1, Nº. 3, 2010, págs. 117-120
• Idioma: inglés
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• Resumen

  • PURPOSE: To report postoperative results in patients with preoperative positive spherical aberration > 0.2 microns after offset-adjusted and standard wavefront-guided excimer laser ablation.

    SETTING: Instituto de Oftalmología La Arruzafa. Córdoba. Spain.

    MATERIALS AND METHODS: Prospective, longitudinal, case-control study in which different target offset adjustments were applied to the Alcon LadarWave-CustomCornea platform before WF ablation in patients with preoperative cycloplegic positive spherical aberration > 0.2 microns. These were assigned to group A and results compared to a control group B.

    RESULTS: For group A, we included 10 eyes of 10 patients with positive spherical aberration > 0.2 microns. For group B, we included charts of 7 patients.

    Postoperative cycloplegic mean refractive spherical equivalent (MRSE) range for group A was 0 to +0.5 D in 65% of eyes and 0 to +1.0 D in 100% of eyes. For group B postoperative cycloplegic MRSE range was 0 to +1.50 D in 100% of eyes, 0 to +1.0 D in 78.6% of eyes, and 0 to +0.5 D in 50% of eyes. After 6 months, group A cycloplegic MRSE was +0.46 ± 0.27(range (0 to +1.0) and +0.75 ± 0.36 (range +0,5 to +1.25) for group B ; p = 0.02. Mean best spectacle-corrected visual acuity (BSCVA) for group A was 1.15 ± 0.68 (range +1 to +1.2) and 1.05 ± 0.08 (range +1.0 to +1.2) for group B; p = 0.002.

    CONCLUSION: Patients undergoing offset-adjusted wavefront ablation obtained less cycloplegic mean refractive spherical equivalent and better BSCVA than those undergoing standard wavefront ablation.