Astigmatic correction of simultaneous femtosecond laser-assi
A Study was conducted to compare the efficacies in astigmatic correction of simultaneous femtosecond laser-assisted cataract surgery (FLACS) with intrastromal arcuate keratotomy (ISAK) versus toric intraocular lens (IOL) implantation with conventional phacoemulsification in moderate astigmatism.

A retrospective chart review was conducted for the patients who had undergone cataract surgery. Researchers identified patients with preoperative corneal astigmatism from +0.75 to + 2.00 diopters (D) who had undergone astigmatic correction with FLACS with ISAK or toric IOL implantation with conventional phacoemulsification. The visual acuity, intraocular pressure, automated keratometer, manifest refraction, and topography preoperatively and 1-day, 1-month, 3-month, and 6-month postoperatively were measured.

Results:
--Of a total of 48 eyes of 48 patients, 27 eyes of 27 patients had FLACS with ISAK, and 21 eyes of 21 patients had conventional cataract surgery with toric IOL implantation.

--Refractive astigmatism was significantly decreased in both groups. The mean preoperative and 6-month postoperative refractive astigmatism were 1.85±1.07 and 0.99±0.51 D, respectively, in the AK group, and 1.84±0.81 and 0.68±0.21 D, respectively, in the toric IOL group.

--There was no significant difference in refractive astigmatism between the two groups at 6-month postoperatively.

--At 6-month postoperatively, parameters for vector analysis of refractive astigmatism showed no statistical difference between the two groups.

--Corneal astigmatism was significantly decreased in the AK group. Corneal astigmatism from topography and the automated keratometer were significantly lower in the AK group 6-month postoperatively compared to toric IOL group.

Finally, FLACS with ISAK appears to be a viable option for minimizing astigmatism and implanting toric IOLs in cataract surgery.

Source: https://bmcophthalmol.biomedcentral.com/articles/10.1186/s12886-021-02059-2
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