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Back-calculation to Model Strategies for Pretreatment Adjustment of the Ablation Sphere in Myopic Wavefront Laser in Situ Keratomileusis by Francisco Arnalich-Montiel; Clare M. Wilson; Steven J. Morton; Bruce D. Allan is a Medicine article available to read on EtoBox.

What is Back-calculation to Model Strategies for Pretreatment Adjustment of the Ablation Sphere in Myopic Wavefront Laser in Situ Keratomileusis about?

## Purpose: To examine strategies for adjusting the ablation sphere in myopic wavefront laser in situ keratomileusis (lasik) with reference to preoperative manifest refraction. ## Setting: Refractive surgery service, moorfields eye hospital, london, united kingdom. ## Methods: The variance in the 3-month postoperative manifest refraction spherical equivalent (mrse) results in 295 consecutive cases of myopic wavefront lasik treated with a nonsystematic, intuitive approach to pretreatment adjustment of the ablation sphere was compared with the variance in modeled results obtained by back-calculation using 4 systematic strategies: (1) no adjustment (no adj), (2) addition of the difference between the preoperative mrse and the preoperative 4.0 mm pupil wavefront refraction spherical equivalent (wrse) (4.0 mm), (3) addition of the difference between the preoperative mrse and the preoperative maximum pupil wrse (max), and (4) addition of the difference between the preoperative mrse and the preoperative effective blur (eb). the eb is a theoretical value for the dioptric se of all aberrations at the pupil size calculated for the hartmann-shack images acquired (wavefront diameter). a strati

Who reads Back-calculation to Model Strategies for Pretreatment Adjustment of the Ablation Sphere in Myopic Wavefront Laser in Situ Keratomileusis?

Author

Francisco Arnalich-Montiel; Clare M. Wilson; Steven J. Morton; Bruce D. Allan

Publisher

Elsevier Science; Elsevier ; Elsevier BV; Ovid Technologies (Wolters Kluwer Health) (ISSN 0886-3350)

Published

2009

Language

EN

Field

Medicine (Health Sciences)