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Abstract
Ruby laser radiation (6,943Å) produced aberrations in the corneal epithelium of the rat. At 4 joules per square centimeter aberrant corneal epithelial cells became apparent immediately after laser irradiation and some were still present 30 days later. At 8 joules per square centimetertwice as many or more atypical cells were found. The mechanism by which laser radiation alters thecornea remains obscure.