Peeks makes an app and a clip-on piece of hardware that non-healthcare experts can use to perform eye-health checks for people who might not otherwise have access to them.

5 startups that could radically transform the world around us

Smartphone-based eye exams, pavement that generates electricity from your feet, a gelatinous way to store water, and a smarter beehive — these inventions may not have the sex appeal of social media, but they could make a huge difference in the world.