What is radial keratotomy (RK)?
Radial Keratotomy (RK) is the oldest of the modern refractive procedures. RK can correct nearsightedness by changing the shape of the cornea. Microscopic incisions of 90% depth, placed in a radial pattern, like the spokes of a wagon wheel, reshape and flatten the central cornea, allowing light to focus more precisely on the retina. The length and number of incisions determine the effect of the surgery. Patients with less than 3 diopters of nearsightedness and stable prescriptions are the best candidates. Today, RK is seldom performed because the Excimer laser can achieve the same effect without the need for placing deep corneal incisions.
