
Why do we rub our eyes when we're tired?
Subscribe to BBC Science Focus magazine
Maybe now you have a good excuse after an all-night Disney marathon.
Asked by: Matthew Cahill, Liverpool
Advertisement
Tired eyes get dry, and rubbing stimulates the lacrimal glands to produce more fluid. Tiredness also closes your eyes, so you may rub to keep them open. Finally, there’s a connection between the muscles that move your eyes around and your heart. When these muscles are stimulated, a reflex slows the heart. This might be relaxing if you feel very tired.
Advertisement
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Authors
Advertisement
Advertisement
Sponsored Deals
Subscription offer
- Subscribe and try your first 3 issues for just £5.
- After your introductory period you will pay just £22.99 every 6 issues by Direct Debit.
- Receive every issue delivered direct to your door with FREE UK delivery.
SUBSCRIBE NOW
Advertisement