Eye Health Education

//Radial Keratotomy (RK)
Radial Keratotomy (RK)2017-03-27T20:30:28+00:00

Radial Keratotomy (RK)

Radial keratotomy (RK) is surgical procedure that has been used since the late 1970’s to reduce myopia by changing the curvature of the cornea.

Using a microscope, microsurgical instruments and a diamond blade, the surgeon makes several deep incisions (keratotomies) in the cornea in a radial or spoke-like pattern. People with myopia have difficulty with distance vision because the cornea has too much power and focuses light rays in front of the retina. RK weakens the support of the cornea, flattening it and reducing its power. This allows the light rays to focus directly on the retina.

RK takes fifteen minutes and may be performed with the patient awake. Eye drops anesthetize the cornea, eliminating pain during the procedure. Following surgery, people are moderately uncomfortable and often require oral pain medication. Antibiotic eye drops need to be taken for approximately one week. Clear vision can be present the day following surgery.

Postoperative complications include glare, halos, undercorrection, overcorrection and astigmatism that may not be able to be corrected with glasses. The major disadvantage of RK compared to laser procedures is it permanently weakens the cornea. Radial keratotomy is currently being used to correct low levels of myopia.

This educational material is provided by Dialog Medical.
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