If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

More than a dozen people queue up in front of a technician with an eye testing machine. The queue moves at a fast clip as the technician alternates between peering through the machine into the ...

This is your first of three free stories this month. Become a free or sustaining member to read unlimited articles, webinars and ebooks. While providing charity eye care in Haiti, Marc Albanese ...