When you live up where the air is thin and the sun is closer, cataracts can be much more common.

The people who live in Nepal are prone to blindness from cataracts, a condition that can be corrected by relatively inexpensive surgery–still too expensive for most of the people in that poor country.

So the Himalayan Cataract Project was born to bring the surgery to the people, and Dr. Matt Oliva is part of the team.

He talks about his trips to the roof of the world and the work he does there.