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Re-treatment after LASIK for correction of myopia and myopic astigmatism.
  1. Mohamed Bragheeth (abdelnaby{at}doctors.org.uk),
  2. Usama Fares (usamafares{at}yahoo.com),
  3. Harminder Singh Dua (harminder.dua{at}nottingham.ac.uk)
  1. Division of Ophthalmology and Visual Sciences, University of Nottingham, United Kingdom
  2. Division of Ophthalmology and Visual Sciences, University of Nottingham, United Kingdom
  3. Division of Ophthalmology and Visual Sciences, University of Nottingham, United Kingdom

    Abstract

    Aim: To evaluate the results of LASIK re-treatment for under correction or regression after primary LASIK procedures for myopia and myopic astigmatism.

    Methods: A prospective evaluation of 360 consecutive LASIK-treated eyes, for myopia and/or myopic astigmatism, 32 eyes of 34 patients were retreated and followed at 3, 6 and 12 months post retreatment. Re-treatment was performed by lifting the original flap after cutting the epithelium around the flap edge with a fine needle. Standard ablation was performed based on the patient’s residual refraction.

    Results: 9.4% of eyes patients required retreatment. Prior to re-treatment the mean manifest spherical equivalent (SE) was –0.99 D ± 1.48 D (range from - 0.75 to -2.63). The mean sphere was - 0.79 D ± 1.20 D (range from –2.50 to -0.50) and the mean cylinder was –0.90 D ± 1.14 D (from –2.75 to 1.25). At 1 year follow up 56% of the eyes were within ± 0.50 D SE and 78% were within ± 1.00 D SE. 78% percent of the eyes examined at one year post re-treatment managed unaided vision of 6/9 or better. Peripheral epithelial ingrowth not requiring treatment, developed in two eyes. Second re-treatment for regression was performed in one eye. A significant correlation was found between the refractive regression and each of the following: preoperative refraction, attempted correction and ablation depth

    Conclusion: LASIK re-treatment for residual myopia, by lifting the original flap is an effective option. Refractive results are fairly predictable and refraction stabilizes by 3 months after re-treatment. Lifting the corneal flap after cutting the epithelium on the flap edges, is easy to perform and has a very low incidence of epithelial ingrowth.

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