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LASIK for the correction of high myopia from -8.00 to -14.00 D in 481 eyes with a minimum of 1 year follow-up

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Session Details

Session Title: Interactive Poster Session 01: Refractive

Session Date/Time: Saturday 13/09/2014 | 14:00-15:00

Paper Time: 14:10

Venue: Interactive Poster Terminal (Poster Village)

First Author: : G.Carp UK

Co Author(s): :    D. Reinstein   T. Archer   M. Gobbe        

Abstract Details


Report the visual outcomes of high myopic LASIK using the MEL80 excimer laser.


London Vision Clinic, London, UK


Retrospective analysis of 481 consecutive high myopic LASIK procedures (319 patients) using the MEL80 excimer laser non-linear aspheric profile and either the Hansatome microkeratome or VisuMax femtosecond laser. Inclusion criteria were attempted maximum myopic meridian ≥-8.00D, CDVA 20/20 or better, and minimum follow-up of 1 year. Standard outcomes analysis, including contrast sensitivity, was performed for the primary procedure and including retreatments. The primary procedure was a deliberate partial correction in 79 eyes (16%), of which 56 (71%) have undergone a retreatment to date. Of the 402 eyes intended for full correction, 64 (16%) have undergone a retreatment. Prior to retreatment, residual stromal bed thickness minimum was determined by Artemis VHF digital ultrasound. A retreatment was performed if the predicted residual stromal thickness was >250 µm at the location of the maximum ablation.


Mean attempted SEQ was -9.38±1.22D (-7.84 to -14.18D) for the primary procedure, and -9.57±1.29D (-7.50 to -14.18D) including all procedures. Preoperatively, mean refractive astigmatism was 1.03±0.84D (0.00 to 4.50D), mean age was 36 years (19 to 60 years), mean average keratometry was 43.9±1.6D (39.4 to 48.5D). Pupil size min-max, median?. After all treatments, SEQ relative to the intended target was -0.26±0.47D (-2.25 to +1.13D) with 69% ±0.50D, 95% ±1.00D. Mean SEQ was -0.29D at 3 months, -0.37D at 6 months, -0.29D at 1 year and -0.39D at 2 years. UDVA was 20/20 or better in 89% and 20/40 or better in 99% of eyes. There was a loss of 1 line of CDVA in 3%, and no eyes lost ≥2 lines. There was no decrease in mesopic contrast sensitivity at 3 and 6 cpd and a small but statistically significant increase in mesopic contrast sensitivity at 12 and 18 cpd (p<0.05). Postoperatively, mean average keratometry was 38.3±1.5D (32.9 to 42.8D). A topography-guided retreatment was performed due to the patient complaining of night vision disturbances in 8 eyes (1.7%) and these patients were all satisfied with their night vision after this procedure.


LASIK ablation for myopia up to -14.00 D with the MEL80 excimer laser was found to be safe, effective and stable.

Financial Interest:

One or more of the authors... has significant investment interest in a company producing, developing or supplying product or procedure presented, One or more of the authors... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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