Author: Barbara Pierscionek, Professor of Eye Health and New Technologies for Sight Improvement, Anglia Ruskin University

AYO Production/Shutterstock More than 2,000 years ago, the Greek mathematician Euclid began his treatise Optics with an assumption that now sounds peculiar: visual rays travelled out from the eye towards the objects we see. We now know that vision works the other way around. But modern imaging has given the old idea an unexpected twist: […]