This outpatient procedure is a safe and effective way to improve your vision—and many patients say it’s life-changing.

In this case, (3 + 1)/2 = 2 D of correction. If a patient has 1 D of asymmetric corneal astigmatism, a single 2 clock-hour relaxing incision might be made on the steep side of the steep meridian.

Laser arcuate keratotomy is not a superior approach to refractive astigmatism correction compared with toric IOL implantation.