Why humans see clearly

A transparent cornea is essential for vision, which is why the eye has evolved to nourish the cornea without blood vessels. But for millions of people around the world, diseases of the eye or trauma spur the growth of blood vessels and can …

Struggling to follow doctor’s orders

CHICAGO — Paid caregivers make it possible for seniors to remain living in their homes. The problem, according to a new Northwestern Medicine study, is that more than one-third of caregivers had difficulty reading and understanding health-related …