To protect the integrity or the ocular surface and to retain corneal transparency, a number of defense mechanisms have evolved.

为了保护眼表面的完整性并维持角膜的透明状态，眼表面将动用多种防御机制。

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To protect the integrity or the ocular surface and to retain corneal transparency, a number of defense mechanisms have evolved.

为了保护眼表面的完整性并维持角膜的透明状态，眼表面将动用多种防御机制。

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