Sleeping in contact lenses greatly increases the risk of serious eye infection, unless specifically approved lenses are prescribed.
Why overnight lens wear is risky
When eyes are closed, less oxygen reaches the cornea. Lenses can trap germs and reduce tear flow, making it easier for infection to take hold.
- Risk of painful corneal ulcers rises several-fold with overnight wear
- Symptoms may include redness, pain, light sensitivity, and blur
- Even short naps can increase risk if lenses remain in place
- Some extended-wear lenses are safer but still carry higher risk
Safe contact lens habits
Removing lenses before sleep is one of the best ways to protect your eyes. Good habits help lenses stay comfortable and vision clear.
- Always follow the wearing schedule recommended by your practitioner
- Have a spare pair of glasses available for late nights and travel
- Never reinsert lenses that have been worn overnight without professional advice
- Seek urgent care if you wake with a painful, red, or watery eye
