The cornea is the eye's clear outer surface that provides most of the visual power.
角膜是眼球外侧一层透明的膜，在视觉系统中非常重要。
Result 10 cases have improved visual power, 2 cases failed to show any improvement.
结果本组12例术后10例视力有提高，2例视力无改善。
Result 10 cases have improved visual power, 2 cases failed to show any improvement.
结果本组12例术后10例视力有提高，2例视力无改善。
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