Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Comparative analysis of the efficacy of astigmatic correction after wavefront-guided and wavefront-optimized LASIK in low and moderate myopic eyes

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Session Details

Session Title: Presented Poster Session: Keratorefractive Surgery Outcomes: Myopia

Session Date/Time: Saturday 10/09/2016 | 15:00-16:30

Paper Time: 15:00

Venue: Poster Village: Pod 2

First Author: : M.Shafik Shaheen EGYPT

Co Author(s): :    M. Khalifa   M. El-Sahn           

Abstract Details


To evaluate and compare the efficacy of astigmatic correction after LASIK in low and moderate myopic eyes using wavefront-guided (WFG) and wavefront-optimized (WFO) ablation profiles provided by two different excimer laser platforms.


Horus Vision Correction Center, Alexandria, Egypt


Prospective, consecutive, comparative, masked clinical trial of 113 eyes with myopic astigmatism which were treated with WFG LASIK using the Advanced CustomVue platform (Abbott Medical Optics Inc) (WFG group), and 116 eyes were treated with a WFO profile using the EX-500 platform (Alcon) (WFO group). Each group was subdivided into two additional subgroups according to the level of myopia: WFG moderate myopia (66 eyes), WFG low myopia (47 eyes), WFO moderate myopia (60 eyes), and WFO low myopia (56 eyes). Visual and refractive outcomes were evaluated during a 6-month follow-up, including a vector analysis of the astigmatic change (Alpins method).


Mean P.O. manifest cylinder was -0.09±0.17, -0.07±0.17, -0.53±0.32, and -0.47±0.41 D in the WFG moderate and low myopia, WFO moderate and low myopia subgroups, respectively with significant difference between WFG and WFO in both subgroups (p<0.001). Significantly higher values of difference vector between targeted and surgically induced astigmatism were found in the WFO subgroups (0.10±0.17, 0.08±0.18, 0.53±0.32, and -0.47±0.41 D, p<0.001). The magnitude of error was higher in the WFO subgps (0.23±0.40 and 0.18±0.45 D) compared to WFG subgps (0.08±0.16 D, 0.05 ±0.16) with significant difference in moderate myopia only(p≤0.008). Similar trend was observed for the angle of error (p<0.001).


A more efficacious correction of astigmatism is achieved with WFG LASIK compared to WFO LASIK, especially in cases of moderate myopia.

Financial Disclosure:

One or more of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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