眼球壁外层前部的透明部分。呈圆形,占外层面积的六分之一,约1毫米厚,主要由无血管的结缔组织构成。前面微微突起,像球面一样弯曲,有折光作用。角膜含有丰富的感觉神经末梢,任何微小刺激、损伤或发炎皆能引起疼痛、流泪。如果用棉花轻触角膜,会引起眼裂闭合的保护性反应,称为角膜反射。角膜和巩膜的连接部分称作角膜缘。角膜缘的血管和眼球内的房水供给角膜营养。正常角膜各径线的曲度是一致的,因此折光率相同。如果曲度不均匀,就会引起折光异常,称为散光。
n. cornea
misc. cerato- ; kerato- ; keratoderma
生物医学研究进一步证明,在角膜与视 网膜二者之间存在范围介于 0.4-10mV 的电势差,其中角膜(Comea)部分电 势较高,可以视为带正电荷;视网膜(Retina)部分电势较低,可以视为带负电 荷。
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角膜炎 [眼科] keratitis ; HSK ; exposure keratitis ; corneitis
角膜反射 Corneal reflex ; corneal reflection ; PCCR ; lid reflex
角膜塑形术 Orthokeratology ; ORTHO-K ; Orthokeratologic Procedures
角膜塑形镜 MCT ; OK ; orthokeratology ; Ortho-K
角膜溃疡 [眼科] corneal ulcer ; keratohelcosis ; Ulcer ; corneal ulceration
圆锥角膜 Keratoconus ; KC ; keratoectasia
角膜接触镜 RGP ; Contact Lens ; corneal contact lens ; soft contact lens
硬性角膜接触镜 RGP ; hard corneal contact lens ; RGPCL ; rigid gas permeable contact lens
角膜白斑 [眼科] walleye ; leucoma ; [眼科] leukoma ; Corneal leucoma
每组包括一对拥有复杂晶状体、视网膜、虹膜和角膜的眼睛。科学家们还不确定它们如何处理它们看到的东西。
Each cluster includes a pair of eyes with a sophisticated lens, retina, iris and cornea. Scientists aren't sure how they process what they see.
彼得出了很多钱买角膜,但时间一天天过去,没有人来捐赠角膜。
Peter offered a lot of money for the cornea, but time passed day after day, nobody came for that.
医生告诉他,只有做角膜移植手术他才能恢复视力。
The doctor told him that only by doing a cornea transplant operation could he bring his sight back.
Lasik surgery Lasik surgery - now why that one, what makes you think of that as an example?
激光辅助屈光角膜层状重塑手术,为什么是激光辅助屈光角膜层状重塑手术,你为什么觉得它属于生物医学工程范畴呢
Particularly the front of the eye, the cornea and the sheet that covers the cornea was particularly damaged.
尤其是眼睛前部,角膜和盖在角膜上面的那层薄片,严重受损。
He went ahead and had the surgery to have the replacement of the cornea.
后来,迈克继续冒险,接受手术换掉了自己的角膜。
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