April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Large series comparison between a new high-resolution and contemporary aberrometer in Wavefront-Guided LASIK to treat low to moderate myopia
Author Affiliations & Notes
  • Steven C Schallhorn
    Department of Ophthalmology, University of California San Francisco, San Francisco, CA
  • Julie Marie Schallhorn
    Department of Ophthalmology, University of California San Francisco, San Francisco, CA
  • Craig S Schallhorn
    University of California San Diego, San Diego, CA
  • Footnotes
    Commercial Relationships Steven Schallhorn, Abbott Medical Optics (C); Julie Schallhorn, None; Craig Schallhorn, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 1516. doi:https://doi.org/
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      Steven C Schallhorn, Julie Marie Schallhorn, Craig S Schallhorn; Large series comparison between a new high-resolution and contemporary aberrometer in Wavefront-Guided LASIK to treat low to moderate myopia. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1516. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose
 

To provide a retrospective comparison of one month outcomes of wavefront-guided (WFG) LASIK using a new (iDesign, Abbott Medical Optics) and contemporary (WaveScan, Abbott Medical Optics) aberrometer for the treatment of low to moderate myopia.

 
Methods
 

Consecutive WFG LASIK conducted in a multi-center practice in the UK (Optical Express) performed with either the new or contemporary aberrometer to treat low to moderate myopia (up to -6D sphere) and cylinder (up to 6D) were retrospectively analyzed. Flap creation methods and other surgical parameters were the same in both groups. Uncorrected visual acuity (UCVA) and predictability of refraction as well as patient-reported outcomes were evaluated at 1 month postoperative.

 
Results
 

There were 8,905 consecutive eyes of 4,721 patients treated using the new aberrometer and 27,290 eyes of 14,589 patients treated with the contemporary aberrometer included in the study. Demographic and preop characteristics were well-matched between the two groups. At 1 month postop, more eyes achieved 20/16 and 20/20 uncorrected distant vision with the new aberrometer compared to the contemporary (new aberrometer: 84.0% and 95.4%; contemporary: 79.7% and 93.8% of eyes with 20/16 and 20/20 UCVA, respectively). The refractive predictability was excellent, with 95.4% and 93.9% of eyes were within 0.5 D of intended MSE in the new and contemporary groups, respectively. The cylinder correction ratio was >0.9 for all levels of astigmatism correction but the new aberrometer had less variance in outcomes and a significantly higher percentage of patients with <=0.5D of cylinder postoperative (95.8%) compared to the contemporary cohort (92.6%). The loss of > 2 lines of best corrected visual acuity was very low in both groups (0.1% and 0.2% in the new and contemporary groups). More patients were satisfied with the outcome of the procedure outcome with the new aberrometer (96.5% vs 95.2%, respectively, p=0.01, chi-squared).

 
Conclusions
 

In this retrospective evaluation of early postoperative outcomes, the new aberrometer WFG LASIK had improved efficacy (UCVA, refractive predictability, and cylinder correction) and higher patient satisfaction compared to contemporary WFG LASIK.

 
Keywords: 679 refractive surgery: comparative studies • 683 refractive surgery: LASIK  
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