Thirty-nine million people in the world are blind, and the majority lost their sight due to curable and preventable diseases. But how do you test and treat people who live in remote areas, where expensive, bulky eye equipment is hard to come by? TED Fellow Andrew Bastawrous demos a smartphone app and cheap hardware that might help.

Andrew Bastawrous

Eye surgeon, inventor
Andrew Bastawrous studies eye health — and builds accessible new tools to bring eye health to more people. He is a 2014 TED Fellow. Full bio