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First Author: F.Orucoglu TURKEY
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The purpose of this study was to evaluate arcuate keratotomy for the correction of mix astigmatism with the use of the femtosecond laser.
Birinci Eye Hospital. Istanbul/Turkey
Clinical data of five eyes of three patients with astigmatism undergoing arcuate cuts using a 150-kHz femtosecond laser (iFS, AMO) were analyzed. A IEK software algorithm was used to create paired arcuate cuts. Arcuat cuts were performed intrastromally in two eyes with simultanous flap creation. After refractive stablization will be achieved excimer laser ablation under flap for residual refraction was planned
The preoperative mean uncorrected visual acuity was 0.2. The best corrected visual acuity was 0.68 with a mean subjective sphere 4,22 D and cylinder -4,95 D. Mean preoperative flat and step keratometry were 41.17 D and 45.42. Preoperative mean topographic astigmatism, central corneal thickness and aspherisity were 4,23 D, 524 micron, and 0.278. The postoperative mean uncorrected visual acuity was 0.34 (p=0.005). The postoperative BCVA changed to 0.78 with sphere 2.64 D and cylinder -2.57 D (p=0.015, p<0.001, p<0.001). Mean flat and step keratometry changed to 42.02 D and 43.96 D postoperatively (p=0.002, p<0.001). Postoperative mean topographic astigmatism, central corneal thickness and aspherisity were 2.0 D, 536 micron, and 0.299(p=0.015, p<0.001, p<0.001). Postoperative mean topographic astigmatism, central corneal thickness and aspherisity were 2.0 D, 536 micron, and 0.299 (p<0.001, p=0.014, p=0.471).
Arcuate keratotomy using the femtosecond laser safe and effective for the correction of corneal astigmatisms.