A stye (sty) is an infection of a follicle or gland at the base of an eyelash, caused by bacteria, usually Staphylococcus. It happens when the follicle becomes clogged with oil or dirt.
stye
Keratoconus
Keratoconus is an eye condition where the cornea becomes thin, resulting in distorted vision. Find out about the causes, symptoms and treatment.
