PURPOSE: To report photorefractive keratectomy (PRK) treated with mitomycin C (MMC) for previous corneal haze in one eye and PRK with MMC to prevent corneal haze formation in the fellow eye. METHODS: A 40-year-old woman underwent PRK with MMC to treat previous corneal haze (secondary to previous PRK without MMC) for residual refractive error of +0.50 +0.25 × 165 in the left eye and PRK with MMC to prevent corneal haze in the right eye. RESULTS: Postoperative slit-lamp examination revealed no haze in the right eye, but continued mild haze in the left eye. CONCLUSIONS: Treatment with PRK and MMC for previous corneal haze is not as effective as primary PRK with MMC in preventing postoperative corneal haze formation.
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