Hank brings the answer into focus. Hosted by: Hank Green

Your eyes might malfunction, but lasers can fix them. Here's how researchers developed those procedures.

Hank brings the answer into focus.

While not the kind of epidemic you're used to hearing about, nearsightedness is becoming a major health issue in many places. Learn about how scientists are finding out the reasons behind the increase in myopia, and how sunlight might be...

This video explores five fun facts about eyes.