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角膜的透明性是维持视觉器官正常功能的重要因素之一，而要维持角膜的透明性则必须保持角膜呈相对的脱水状态。近代研究表明，在人的一生中，角膜能始终保持相对的脱水状态是通过角膜内主动的代谢性“液泵”作用和把房水与角膜基质隔开的物理性屏障作用共同实现的。70年代初，M
The transparency of the cornea is one of the important factors to maintain the normal function of the visual organ. To maintain the transparency of the cornea, it is necessary to keep the cornea relatively dehydrated. Modern studies have shown that in a person’s life, the cornea can always maintain a relatively dehydrated state is through the active metabolism of the cornea within the “liquid pump” and the aqueous humor separated from the corneal matrix physical barrier effect together. Early 70s, M.