Comparison of Night Driving Performance after Wavefront-Guided and Conventional LASIK for Moderate Myopia

  • Published: Ophthalmology, Volume: 116, Issue 4, 2009
  • Authors: Schallhorn, Steve C, Tanzer, David J, Kaupp, Sandor E, Brown, Mitch and Malady, Stephanie E
  • Date Added: 30 Jan 2014
  • Last Update: 30 Jan 2014
  • Format: pdf


To compare pre-operative and post-operative changes in simulated night driving performance after two types of laser eye surgery to treat moderate myopia.


A night driving simulator (NDS) test with 38 cLASIK patients and 21 wLASIK patients, none of whom were older than 51 years.

Key Findings:

  • The results showed that in every category, there was a mean reduction in the pre-operative to post-operative NDS performance after cLASIK.

  • There was a corresponding mean improvement after wLASIK.Significant differences between cLASIK and wLASIK NDS performance was observed in every category.

  • A clinical relevant loss of NDS performance (greater than 0.5 seconds) was observed in 32% to 38% of cLASIK eyes for all tasks, whereas only 0% to 3% of eyes had this loss after wLASIK.

  • Between 2% and 7% of cLASIK eyes and 11% and 31% of wLASIK eyes had a significant postoperative improvement in NDS performance in every task.

  • Wavefront-guided LASIK to correct myopia combined with a femtosecond laser flap significantly improved mean night driving visual performance and was significantly better than cLASIK using a mechanical keratome.