A robotic device allows eye surgeons to perform high-precision procedures on the retina, the fragile lining on the back of the eye that is less than a millimeter thick.

Reviewers call it a “magical eye hugger” for relaxation that can even play music. But hurry, the coupon won’t last long!

Researchers have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing. The study shows that the pupil is smallest during inhalation and largest during exhalation ...