May 2005
Volume 46, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2005
Refractive Results After LASIK With Esiris Excimer Laser – Investigation of the Flap Thickness of 140 µm compared to 160 µm
G. Unger; D. Sandner; D. Langner; T. Baier; M. Kohlhaas; L.E. Pillunat
Author Affiliations & Notes
  • G. Unger
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • D. Sandner
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • D. Langner
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • T. Baier
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • M. Kohlhaas
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • L.E. Pillunat
    Ophthalmology, University Eye Clinic, Dresden, Germany
  • Footnotes
    Commercial Relationships  G. Unger, None; D. Sandner, None; D. Langner, None; T. Baier, None; M. Kohlhaas, None; L.E. Pillunat, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2005, Vol.46, 4394. doi:
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      G. Unger, D. Sandner, D. Langner, T. Baier, M. Kohlhaas, L.E. Pillunat; Refractive Results After LASIK With Esiris Excimer Laser – Investigation of the Flap Thickness of 140 µm compared to 160 µm . Invest. Ophthalmol. Vis. Sci. 2005;46(13):4394.

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Abstract

Abstract: : Purpose: To avoid an iatrogene Keratectasie after LASIK the remaining thickness of the stroma has to be 250 µm. In cases that need higher corrections and have a primary smaller corneal thickness a thinner flap is desired to to keep more stroma for ablation. The possible influence of the thinner flap thickness for functionell and refractive results was investigated. Methods: During the period from 03/04 to 06/04 14 eyes of 7 patients (mean age of 32 years) was performed in LASIK with the Esiris Excimer Laser. The Amadeus microceratom was used to cut the flap. 0n the right eyes a flap thickness of 160µm were chosen on the partner eyes one of 140µm. The preoperative mean spherical equivalent was –5.35 D (SD ± 2,22 D; –8,25 D to –2,0 D) in the 140µm flap thickness group vs –4,94 D (SD ± –2,43 D; –8,75 D to –1.75 D) in the 160µm flap thickness group. All treatments were realized to same standards and were finished succesfully. Postoperative complications didn't occur. Results: With both flaps a slight undercorrection could be observed which stayed stable during follow–up. There was no significant difference between both groups (–0,63D vs –0,67D). In comparison, in 55% (vs 67%) visual acuity remained the same, in 18% (vs 17%) visual acuity improved by one line and in 27% (vs 17%) there was a reduction of best corrected visual acuity by one line in eyes treated with a 140µm (vs 160µm). 69% of the eyes in the 160 µm flap–group showed a uncorrected visual acuity of 0,8 or better vs 85% in the 140µm flap–group. Conclusions: There is no increase in complications while performing LASIK with a flap thickness of 140µm. Occurance of corneal striae was not observed more often with 140µm flaps. In tendency, the risk for a reduction in visual acuity is slightly lower with a flap thickness of 160µm, but the chance of an improvement in visual acuity and of reaching a best corrected visual acuity of 0,8 or better is higher with a flap thickness of 140µm.

Keywords: refractive surgery: LASIK • refractive surgery: optical quality • visual acuity 
© 2005, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2025 Association for Research in Vision and Ophthalmology.
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