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The lens of the eye accommodate to distance. 眼球晶状体能根据距离进行调节。
A cataract is a painless clouding of the lens of the eye. 白内障是眼球晶状体的无痛混浊现象。
CATARACT:A clouding of the lens of the eye, resulting in blurred vision. 白内障：眼睛的晶体变得混浊，导致视力损害。
Ultraviolet radiation increases the risk of cataracts, which cloud the lens of the eye and can cause blindness. 紫外线辐射增加了白内障的危险，这种疾病使眼睛的晶体蒙上缀障并能导致失明。
Ultraviolet radiation increases the risk of cataracts,which cloud the lens of the eye and can cause blindness. 紫外线辐射增加了白内障的危险，这种疾病使眼睛的晶体蒙上缀障并能导致失明。
Cataract: The lens of the eye becomes progressively clouded, blocking light entry and resulting in blurred vision. 白内障:眼睛的晶状体因各种原因而变得混浊,导致视力逐渐模糊。
The lens of the eye loses elasticity with age resulting in inability to focus clearly on near objects. 由于晶状体随著年的增长而慢慢失去弹性,当要看近的东西时,便不能准确聚焦,令影像模糊。
Rupert: I kicked the lens of the camera off. 鲁柏:我踢中了摄影机的镜头。
The lens of the computer's sensor glowed briefly. 电脑传感器的镜头发出一阵短暂的光。
What's the strength of the lenses of your glasses? 您的眼镜多少度?
A cataract is a clouding or dulling of the lens in the eye. 白内障就是眼睛的晶状体上有阴影或者浑浊。
The automatic adjustment in the focal length of the lens of the eye to permit retinal focus of images of objects at varying distances. 眼调节眼睛瞳孔对焦距的自动调节，以获得不同距离的物体在视网膜上的成像
Some adjustment of the lens may be necessary. 可能有必要调节一下镜头。
A horse focuses its eye by changing the angle of its head, not by changing the shape of the lens of the eye, as humans do. 马通过转动头的角度使眼镜聚焦,不象人那样通过改变瞳孔的形状聚焦。
For example, long-term use of corticosteroids may lead to glaucoma and cataracts (clouding of the lens of the eye that impairs vision). 比如长期使用皮质类固醇会导致青光眼和白内障。
Eye are the important apparatus of body.Opacity in the lens of the eye, resulting in senior's blurred vision, i.e.Senile Cataract. 眼睛是人体内极重要的器官，因眼睛内的晶体出现老化及混浊，便会导致视力减退，一般称为白内障。
Intra-capsular (ICCE) surgery involves removing the entire lens of the eye, including the lens capsule, but it is rarely performed in modern practice. 出现在视轴上的混浊对视力的影响较大，例如后囊下的混浊，由于其处于眼球这个光学系统的节点处，所以即便是较小的混浊也对视力有较大的影响。
The changing vivid colours of the sunset fascinated the eye. 日落时变化多端的色彩使人看得入迷。
Surgical removal of part of the iris of the eye. 虹膜切除术手术切除部分虹膜
Battista della Porta in1589, but it was not until1611 that Kepler compared a lens of glass to the lens in the eye and showed that rays from each point of an object were brought to a focus at each corresponding point of an image on the retina. 透镜可以集结更多的光束，并且依然可以象小孔一样成相，但是有一点两者不同，在小孔摄影机里，无论胶片与小孔的距离远近，光线都可以相成同样清晰的影像。