Mydriasis is the medical term for an unusual dilation or widening of the pupils. Normally, a person’s pupils dilate when the light is dim so that more light can enter the eye. Mydriasis describes a condition where the pupils dilate without a change in the levels of light. In this article, we look at the causes and possible treatments for mydriasis. We also discuss when a person should see a doctor about this symptom.
Pupils are the black circles in your eyes. They gather light and bring it to the retina to form images. Typically, the pupils dilate, or widen, in response to low light so they can collect more light. Sometimes pupils will dilate for a reason unrelated to the levels of light in the environment. They may stay enlarged even in bright environments. Doctors refer to this condition as mydriasis. The opposite of mydriasis is when pupils constrict and get smaller. This is called miosis.

Showing all 10 results