Purpose: To investigate the expression and distribution characteristics of growth factors and their receptors in normal cornea and limbus .

目的：探讨各种生长因子及其受体在正常角膜和角膜缘的表达及分布规律。

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Objective to observe the expression of collagen type I and II in normal cornea and keratoconus, and discuss the effects on the keratoconus.

目的观察正常人及圆锥角膜中i、II型的表达，探讨胶原i、II型在圆锥角膜病变中的变化。

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Conclusions The normal parameters on pan corneal thickness and corneal shape of both anterior and posterior surface will provide much more useful informations in finding abnormal cornea.

结论了解正常人全角膜厚度、角膜高度形态及角膜前表面角膜屈率地形图将为诊断异常角膜提供依据。

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It is hoped the cornea will move back to a normal shape and the eyesight will be corrected and prevented from further damage.

BBC: Pioneering eye op for schoolboy

"If there is only a problem in its inner layer, it may be possible to replace just that part of the cornea, leaving the patient's normal and healthy tissue in place, " said Mr Muhtaseb, a Singleton-based consultant ophthalmologist.

BBC: New eye surgery shortens recovery