Related Experiment Video
Updated: Jun 17, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
Published on: September 20, 2024
[Correction of ocular aberrations in custom and standard LASIK retreatments]
Andréia Peltier Urbano1, Walton Nosé
1Universidade Federal de São Paulo, São Paulo, SP, Brasil. andreiaurbano@terra.com.br
Purpose:
To compare the correction of ocular aberrations between custom and standard LASIK retreatment.
Methods:
Prospective, randomized trial with paired eye control of 74 eyes from 37 patients who underwent LASIK retreatment. Each patient underwent retreatment using Zyoptix LASIK (Bausch & Lomb) in 1 eye and Planoscan LASIK (Bausch & Lomb) in the fellow eye. Correction of ocular aberrations was compared between custom and standard LASIK retreatments.
Results:
At 6 months, there was a statistically significant reduction in defocus, astigmatism, coma, spherical aberration, second, third, higher-order and total aberration in Zyoptix eyes. There was a statistically significant reduction in defocus, second-order and total aberration in Planoscan eyes.
Conclusions:
Custom retreatment was statistically superior than standard retreatment for correction of lower and higher ocular aberrations.
Related Concept Videos
Focusing of Light in the Eye
Angle Closure Glaucoma: Treatment
Open Angle Glaucoma: Treatment
Drugs such as carbonic anhydrase inhibitors, α2- and...