目的：了解PRK后角膜上皮延迟愈合发生的原因及其对视力、角膜上皮下混浊等的影响。

Objective: to observe the factors that cause a delay in healing of the corneal epithelium and its effects on haze and vision after PRK.

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两组均于手术后1、3、6、12个月复查视力、屈光度、角膜地形图及角膜上皮下基质混浊等并发症情况。

After surgery, the vision, refraction, corneal topography, corneal haze and other complications of all patients were observed at 1, 3, 6, 12 months.

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