7 reasons why your pupils may be dilated

Most of the time, our eyes show a normal pupil size. Patients understand that pupil dilation (when pupils become larger) occurs in low light and will shrink in bright light. Pupils will return to their normal size in time and without treatment. But, many patients are understandably concerned when their pupils, or those of a family member, suddenly enlarge and remain that way. Read on to learn about the causes of dilated pupils.