A curable condition that causes blindness - Andrew Bastawrous

source: TED-Ed       2015年9月28日
View full lesson: http://ed.ted.com/lessons/a-curable-c...
An estimated 20 million cases of blindness worldwide are caused by cataracts, a curable condition affecting the lens that focuses images onto the eye’s retina. But how are cataracts formed, and how can we prevent them? Andrew Bastawrous gives the facts on cataracts.
Lesson by Andrew Bastawrous, animation by FOX Animation Domination High-Def.