Femtosecond laser in-situ keratomileusis flap configurations

Pravin K. Vaddavalli, Sonia H. Yoo

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Purpose of review: The corneal flap laser in-situ keratomileusis (LASIK) is among the most important determinants in the successful outcome of the surgery. Femtosecond lasers have evolved over the last decade to all but replace the mechanical microkeratome as the preferred method to create these flaps. With improvements in femtosecond laser technology, there has been a reduction in the time taken for the cut and the quality of the stromal bed has improved. Improved predictability has led surgeons to explore the possibility of thin flap LASIK. Recent findings: Corneal flaps created with the femtosecond laser have been shown to be more predictable in depth and have a more desirable planar morphology. Corneal flaps created by the femtosecond laser can be customized according to depth, profile, morphology, and side-cut configuration. Changes in the angulation of the side cut, to reduce the incidence of epithelial ingrowth, have not been corroborated by clinical evidence as yet. Thin flap LASIK, also referred to as sub-Bowmans keratomileusis, has the advantage of preserving more stroma and potentially reducing the incidence of corneal ectasia but seems to be associated with an increased incidence of interface haze. Summary: This review examines the advantages of creating a flap with the femtosecond laser and the various configurations of these flaps. It also explores the advantages of varying the thickness and profile of femtosecond flaps.

Original languageEnglish (US)
Pages (from-to)245-250
Number of pages6
JournalCurrent opinion in ophthalmology
Volume22
Issue number4
DOIs
StatePublished - Jul 1 2011

Keywords

  • corneal flap
  • femtosecond laser
  • flap morphology
  • laser in-situ keratomileusis
  • side cut
  • thin flap laser in-situ keratomileusis

ASJC Scopus subject areas

  • Ophthalmology

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