I'm a 15 year old female, and I recently got a black eye. I thought nothing of it, iced it when I could. But I've noticed very subtle doubles of everything I see out of that eye. Is that normal? Thank you.
No its not. The most serious complication of a "black eye" is internal damage to the eye; second is probably damage to the floor of the eye socket so called "blow out fracture" which can cause doubling. Tell your parents and get in to see an Eye MD ophthalmologist.