A member asked:

One of my pupils is dilated to almost twice the size of the other. what can cause this?

3 doctors weighed in across 2 answers
Dr. David Dunn answered

Specializes in Phlebology

Anisocoria: Anisocoria refers to unequal pupils. Physiologic anisocoria is very common and normal in up to 20% of people. The variation should be no more than 1mm and both eyes should react normally to light. It can be dangerous if it is a form of horner's syndrome (e.g. Carotid dissection) or from damage to the third nerve (e.g. Aneurysmal expansion) so you should get it checked out!

Answered 4/24/2015

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Unless you went to: Eye doctor and he administered eye drops to dilate your pupils, this is a dangerous sign of brain damage. Get to emergency dept of your nearest hospital right away.

Answered 5/7/2018

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Related Questions

A member asked:

I woke up one morning and one of my pupils was dilated, is this serious?

2 doctors weighed in across 2 answers