What causes pink eye?
Pink eye is an infection or inflammation of the transparent membrane (conjunctiva) that lines your eyelid and the whites of your eyes. It causes the small blood vessels in your eyes to become inflamed, giving your eyes that telltale red or pink color.2 Pink eye has several causes, including:
- Chemicals or irritants
Although pink eye is irritating, it’s rarely serious or likely to affect your vision. But certain types of pink eye are highly contagious. A proper diagnosis and early treatment can help prevent spreading it to others.