Purpose: A retrospective comparison of the visual outcomes of  i-LASIK Technology Suite on 248 eyes with myopic astigmatism of at least 0.50 dioptres by using intralase femtosecond with wavescan wavefront-guided as well as conventional excimer laser 
Methods:   A retrospective analysis comprised of 248 consecutive eyes treated for myopic astigmatism with femtosecond LASIK by the same surgeon. 206 eyes received the conventional excimer treatment and 42 eyes received the wavescan wavefront-guided excimer treatment . Postoperative visual acuity, mean sphere, cylinder, and spherical equivalent (SE) were evaluated at 1 week, 1 month and 3 months postoperatively.
Results: In the group of conventional excimer treatment, the preoperative mean spherical equivalent (SE) was −4.01 ±1.34 D, which was corrected to -0.13 ±0.15D (3 months postoperative). The mean preoperative cylinder error was -0.62±0.32D and was corrected to -0.16±0.21D (3 months postoperative). In the group of wavescan wavefront-guided excimer treatment, the pre-operative mean spherical equivalent (SE) was −5.67±1.37 D, which was corrected to -0.12 ± 0.21D(3 months postoperative) . The mean preoperative cylinder was 1.04±0.78 D and was corrected to -0.11±0.16 D (3 months postoperative). 
Conclusions: The use of the advanced nomogram increased treatment accuracy in terms of postoperative mean refraction. In myopic astigmatism, the wavescan wavefront-guided excimer treatment (i-LASIK Technology Suite)gave better results than conventional excimer treatment alone.