"The potential of this procedure to render good uncorrected visual acuity must be weighed against its known risks. Refractive side effects include anisometropia (imbalanced vision), increased astigmatism, and early symptomatic presbyopia (loss of near focus in middle age) in overcorrected patients. Other side effects include prolonged unstable vision and mild glare. Complications that  produce loss of vision are extremely rare. These include ocular infections and increased risk of rupture of the cornea following severe trauma."

Statement on Radial Keratotomy, George O Waring III - 1988

"No matter how justified the procedure may seem on the basis of physical and refractive qualifications, the decision for surgery must depend on knowledge and understanding of the risks versus the benefits, and that decision must lie with the patient"

Dr Spencer Thornton, Radial and Astigmatic Keratotomy - 1994

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Volume 93, Issue 3 , Pages 319-326, 1 March 1986 

Visual impairment following radial keratotomy. A cluster of cases

Thirteen patients who underwent radial keratotomy developed complications leading to visual impairment. Three eyes were legally blind. Two groups of complications were seen: those common to surgical procedures involving the eye--optic atrophy, infections, cataract and retinal detachment, and those unique to radial keratotomy--complete failure of the procedure, marked undercorrection, marked overcorrection, and induced astigmatism. Symptoms due to anisometropia were prominent in the latter group who considered themselves visually disabled by the surgery. Radial keratotomy, like all surgical procedures, is liable to complications that may lead to visual impairment, blindness, or loss of an eye.