| Objective:To investigate the early changes in the amount of surgically induced astigmatism(SIA) and the visual outcome following Femtosecond laser clear corneal incision for cataract surgery compared to the traditional manual sutureless 2.2mm superior clear corneal incision at 12-o’clockMethods:A prospective,comparative analysis was performed in case series.A total of 48 eyes of 41 patients had undergone cataract surgery,with 20 eyes underwent Femtosecond laser-assisted cataract surgery and 28 eyes underwent manual cataract.The main outcomes were the surgically induced astigmatism(SIA) and the distance visual acuity (unaided and best corrected) at one 1 and 3 months postoperatively.Results:This study included 48 eyes of 41 patients with a mean age of 65.2 ± 12 years old(range 38 to 89 years).20 eyes received femtosecond laser-assisted CCIs(Group 1)and 28 eyes received manual CCIs(Group 2).The mean preoperative corneal astigmatism was 0.81 ± 0.43 D and 0.82± 0.52 D for Group 1 and Group 2,respectively,whereas,1 month and 3 months after cataract surgery,it was 0.91 ± 0.81 D;0.85±0.55 D and 0.89 ± 0.73 D;1.03±0.64 D,respectively.There was no statistically significant difference between the 2 groups for preoperative astigmatism and postoperative astigmatism(P>.05).The mean SIA in laser and the manual group at 1 month was 0.57±0.75 D and 0.61 ±0.73 D,respectively.The mean SIA of the manual group was unchanged 0.60±0.73D,whereas,the mean SIA of laser group decreased to 0.37±0.92 D at 3 months,although was not statistically significant between the two groups(P =0.318).The preoperative uncorrected distance visual acuity(UDVA)were 0.28 ± 0.20 for laser group and 0.31 ± 0.20 for manual group,there was no statiscally significant(P = 0.860).The preoperative best corrected visual acuity(BCDVA)were 0.33 ± 0.26 for the laser group and 0.36 ± 0.23 for the manual group,there was no statistically significant(P = 0.789).The uncorrected distance visual acuity for femtosecond laser group at one month and three months postoperatively were 0.74 ± 0.24 and 0.85 ± 0.19,respectively,higher than the manual group 0.64 ± 0.27 and 0.76 ± 0.30,but were not statistically significant(P>.05).The best corrected distance visual acuity(BCDVA)at one month and three months postoperatively were 0.88 ± 0.24 and 0.97 ± 0.07 for the laser group,respectively and 0.86 ± 0.23 and 0.92 ± 0.19 for the manual group,respectively,there were no statistically significant between groups(P>.05).Preoperative IOP was 17.7 ± 3.20 mmHg for the laser group and 16.9 ± 3mmHg for the manual group,there was no statistically significant between groups.The postoperative IOP at one month and three months were 14.2±2.60 mmHg and 14.1 ±0.86 mmHg for the laser group,respectively and 13.3± 1.90 mmHg and 13.1±1.64 mmHg for the manual group,respectively,there were no statistically significant between groups(P>.05).Conclusions:Surgically induced astigmatism and the visual outcome do not vary significantly early postoperative period between femtosecond laser-assisted clear corneal incision and the manual clear corneal incision for cataract surgery.Nevertheless,there was a decrease in surgically induced astigmatism in laser group at three months postoperatively;however,it remains unchanged for the manual group.Conduct of further studies with a larger series of patients and clear corneal incision placement regard of the patient’s own corneal cylinder and axis and longer follow-up is warranted in order ensure the long-term refractive outcomes. |
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