Abstract:PURPOSE: To determine the ratio of defocus (Z4) to spherical aberration (Z12) in patients with optimal visual performance 10 years after multifocal aspheric photorefractive keratectomy (PRK).
METHODS: The optimal ratio of defocus to spherical aberration was determined in 16 presbyopic patients (32 eyes) with 10-year follow-up after aspheric multifocal PRK with good to excellent visual acuity postoperatively and the absence of mesopic symptoms such as halos and glare. All patients were satisfied with … Show more
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