Ask an Eye M.D. Answer Archive
Please read our important medical disclaimer.
When a boxer gets knocked out in a fight, why do the pupils always roll to the back of their head?
What you are describing is the rolling up of the eyes related to loss of consciousness which is called "Bell's phenomenon.” It is thought to be a protective reflex. Since vision is lost when consciousness is lost, a rolling up of the eyes moves the more sensitive parts under the protection of the upper lid so the eye will maintain its health and vision when consciousness returns.
Answered by: Richard Bensinger, MD
Categories: General Eye Health
Have a question that hasn't been answered yet? Ask it!
Answered: Aug 06, 2013
Search for Questions & Answers
Meet Our Experts
- Your questions are answered by more than two dozen members of the American Academy of Ophthalmology who volunteer their time with EyeSmart.