الفهرس 
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Abstract
We conducted a comparative study to compare astigmatic correction using femtosecond laser-assisted refractive lenticule extraction ReLEx and wavefront-guided laser insitu keratomileusis Wfg-LASIK.
We included 108 eyes of 75 patients in our study, all patients had manifest refractive astigmatism ≤ -2.75 D, range between - 0.50 to - 2.75 D.
Intraoperative cyclotorsion was compensated for using the iris registration in the wfg-LASIK, however this was not available in ReLEx cases.
Another major characteristic difference was using the femtosecond laser technology for preparing the flap in FLEx procedure while flap was prepared using the conventional mechanical microkeratome in wfg-LASIK cases.
The follow-up period for the cases included in our study was 6 months, cases failed to complete the follow-up period were excluded from the study.
The postoperative visual and refractive outcomes were statistically compared within each group and between both groups.
We found statistically significant change within each group comparing the visual outcome parameters (uncorrected distance visual acuity, corrected distance visual acuity, refractive astigmatism) both preoperatively and at 6-months postoperative.
Regarding comparison of wfg-LASIK and ReLEx cases, we did not find statistically significant difference between both groups.
We applied Alpins method of power vector to analyze the astigmatic correction comparing both groups. There was a statistically significant difference in the mean value of success index (p=0.02) with better correction obtained in ReLEx cases; however, we did not find statistically significant difference regarding other parameters of Alpins analysis.
from previously mentioned results, we could conclude that both wfg-LASIK and ReLEx performed well and in a similar way correcting mild to moderate refractive astigmatism.
For a future perspective, we encourage further research to refine the nomograms dealing with refractive patients and trying to develop this technology using the femtosecond laser so it could be able to track the eye movements intraoperatively and compensate for intraoperative cyclotorsion.