title: The Changes of Tear Status after Conventional and Wavefront-Guided IntraLASIK.
abstract: BACKGROUND
  IntraLASIK is a LASIK surgery that involved IntraLase femtosecond laser for the corneal flap creating. The objective of this research was to investigate and compare the changes in tear status at 1 and 3 months after undergoing conventional IntraLASIK with Bausch & Lomb PlanoScan (PS) algorithm, Bausch & Lomb Zyoptix Tissue Saving (ZTS) algorithm, and wavefront-guided (WG) IntraLASIK with VISX CustomVue.
  
  
  METHODS
  Tear status of 36 patients who were divided into 3 groups depending on the type of IntraLASIK they underwent (PS, n = 13; ZTS, n = 9; WG, n = 14) was evaluated. Tear status was determined by classifying the category of the thickness of pre-corneal tear lipid layer, non-invasive tear break-up time, and tear meniscus height. Repeated measures analysis of variance (ANOVA) and one way ANOVA were used for the statistical analyses.
  
  
  RESULTS
  The category of the thickness of tear lipid layer, non-invasive tear break up time and tear meniscus height were neither significantly changed after IntraLASIK for all groups nor showed significant difference among groups at 1 and 3 months post-IntraLASIK (P > 0.05). Blinking rate and palpebral aperture also had no significant changed after IntraLASIK.
  
  
  CONCLUSIONS
  Both conventional (PS and ZTS) and WG IntraLASIK did not affect tear status up to 3 months post-IntraLASIK. WG IntraLASIK did not show superiority in preserving tear status 1 and 3 months post-surgery compared with conventional IntraLASIK.
authors.affiliation: Faculty of Optometry & Vision Sciences, SEGi University College, No. 9, Jalan Teknologi, Kota Damansara, 47810 Petaling Jaya, Selangor, Malaysia.
authors.forename: Say Kiang
authors.initials: SK
authors.lastname: Foo
authors.forename: Sharanjeet
authors.initials: S
authors.lastname: Kaur
authors.forename: Faudziah
authors.initials: F
authors.lastname: Abd Manan
authors.forename: Aloysius Joseph
authors.initials: AJ
authors.lastname: Low