but it's permanently

但这个是永久性植入眼内
placed inside the eye over your natural lens.

从而取代天然晶状体的
This is for people that have very severe difficulty in vision,

这是为那些因天然晶状体某些性质的改变
because the properties of their natural lens have changed.

而存在严重视力障碍的人们设计的
So, you can put an artificial material,

你能把一个人工材料
so it's made of a polymer, inside the eye.

一个高分子聚合物植入眼内
It can stay there for the rest of their lives

这个植入物能终身留存于他们体内
restoring their vision to near normal

帮助他们的视力恢复到接近正常水平
and requiring no other effort on their part.

同时不需要身体其他部分的帮助
They don't have to put in the contact lens everyday,

他们不需要每天脱戴隐形眼镜
because it's there inside their eye all the time.

因为这是永久性植入他们眼睛里的
What kinds of materials are these that we can use now

这种我们今天能用于替换或恢复