Approximately 20 million people worldwide are blind because of cataracts, a buildup of protein that clouds the eyes' lens.

We think of cataract as only affecting older people, but they are a serious problem for young children in developing countries too.

Cataracts are not difficult to treat, the operation takes around 20 minutes and is usually inexpensive. However, it is crucial, especially for children, that the disease is treated early; if left untreated for too long, it can lead to permanent blindness.

Thus, there are two main obstacles in developing countries in regards to cataracts. The first is awareness about the disease and the second is having the resources to treat it. Because when we say the treatment is inexpensive, we mean it's inexpensive in developed countries' standards.