June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
The effect of procedure room temperature and humidity on LASIK outcomes
Author Affiliations & Notes
  • Michael Seider
    Ophthalmology, University of California, San Francisco, San Francisco, CA
  • Stephen McLeod
    Ophthalmology, University of California, San Francisco, San Francisco, CA
  • Travis Porco
    Ophthalmology, University of California, San Francisco, San Francisco, CA
  • Steven Schallhorn
    Ophthalmology, University of California, San Francisco, San Francisco, CA
    Optical Express, Inc., Glasgow, United Kingdom
  • Footnotes
    Commercial Relationships Michael Seider, None; Stephen McLeod, None; Travis Porco, NIH NEI (F); Steven Schallhorn, AMO (C), Allergan (C)
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 3110. doi:https://doi.org/
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Michael Seider, Stephen McLeod, Travis Porco, Steven Schallhorn; The effect of procedure room temperature and humidity on LASIK outcomes. Invest. Ophthalmol. Vis. Sci. 2013;54(15):3110. doi: https://doi.org/.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: To determine if procedure room temperature and humidity during LASIK affects refractive outcomes in a very large patient sample.

Methods: Patients aged 18 to 75 years old who underwent LASIK at an Optical Express, Inc. location in their United Kingdom and Ireland centers from January 1, 2008 to June 30, 2011 who met inclusion criteria (including post-operative refractive goal of plano) were included. Patient age, gender, pre- and one month post-LASIK manifest refraction and flap creation technique were recorded as well as the ambient temperature and humidity during LASIK. Effect size determination, in addition to univariate and multivariate analysis was performed to characterize the relationships between LASIK procedure room temperature and humidity and post-operative refractive outcome.

Results: 202,394 eyes of 105,712 patients were included. When considering all eyes in our population, an increase of one degree Celsius during LASIK was associated with a 0.003 diopter more hyperopic refraction one month post-operatively (P=0.0094) and an increase in one percent humidity was associated with a 0.0004 more myopic refraction (P<0.0001). These effect sizes were considered clinically insignificant and were the same or similar when considering only myopic eyes, only hyperopic eyes and subgroups of eyes stratified by age and pre-operative refractive error.

Conclusions: Procedure room temperature or humidity during LASIK was found to have no clinically significant relationship with post-operative manifest refraction in our population.

Keywords: 683 refractive surgery: LASIK • 678 refractive surgery  
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×