Effect On Correcting Corneal Astigmatisms With Femtosecond Laser Corneal Relaxing Incisions In Cataract Surgery

Objective:To investigate the femtosecond laser corneal relaxing incisions in reducing corneal astigmatism during cataract surgery.Method:Thirty three patients(33 eyes)which coneal regulation astigmatism was between 0.75 D to 3.0D underwent femtosecond laser-assisted cataract surgery using the LenSx laser.Coneal astigmatism was measured before sugery using IOL-Maser and Verion,and The LenSx femtosecondlaser with the Verion Vision Planner was used to create all arcuate incisions.Corneal astigmatism was measured before and 1 and 3 months after the surgery.To obtain the uncorrected monocular distance visual acuity(UNVA),net corneal changes,depth of corneal thickness and penetrating keratolysis.Vector analyses were peformed.Results:One and 3 months postoperatively,respectively,the mean keratometric astigmatism was reduced significantly by 0.32 diopter(D)and 0.37 D(both P<0.01);compared with preoperative corneal astigmatism,SIA was 0.76±0.57 D and 0.79±0.60 D,CI was 0.61±0.46 and 0.62±0.47,ME was 0.49±0.56 D and 0.46±0.55D;The absolute value of preoperative astigmatism was divided into the lower astigmatism group and the moderate astigmatism group with 1.5D.The ER was higher than that in the moderate astigmatism group(P < 0.05).The ATR group CI was greater than that in the WTR group(P < 0.05).The depth of CRIs was(64.96±2.6)% and(62.54±4.1)% at 1 month and 3 months postoperatively,which was smaller than 85%.Conclusions:Arcuate incisions made with a femtosecond laser to treat moderate levels ofresidual refractive astigmatism after previous cataract surgery may reduce dependence onspectacles for distance vision.