RK (Radial keratotomy) was the first procedure to correct nearsightedness. Developed in Russia, it became popular in the United States in the early 1980’s. RK has helped millions enjoy improved vision without corrective eyewear.

An ophthalmologist uses a diamond blade to make small incisions on the periphery of the cornea.

These incisions flatten or reshape the cornea and improve vision. Although still performed on low myopic individuals, LASIK has replaced RK as the most commonly performed procedure today.