Presbyopia is a normal part of aging that makes it harder for older adults to see things up close. Read about what causes presbyopia and how to manage it.| www.nei.nih.gov
Refractive errors are a type of vision problem that make it hard to see clearly. They happen when the shape of your eye keeps light from focusing correctly on your retina. Read about the types of refractive errors, their symptoms and causes, and how they are diagnosed and treated.| www.nei.nih.gov