Doctor explains serious risks of sleeping in contact lenses

An anaesthesiologist and interventional pain medicine physician warned that sleeping in contact lenses significantly increases the risk of developing serious corneal infections. Dr Kunal Sood shared the medical warning on Monday, July 13, 2026, to explain how the common habit can weaken the protective surface of the eye and threaten long-term vision.

Hindustan Times reported on the physician's digital presentation, which highlighted how the cornea relies heavily on a steady supply of oxygen from the air to remain healthy. Whilst contact lenses naturally reduce this gas flow during waking hours, keeping them in during sleep restricts the oxygen supply even further. This combined lack of oxygen weakens the outer surface of the eye, creating an ideal environment for harmful bacteria to multiply and cause severe infections.

Sood explained that a primary complication of improper contact lens usage is a condition called microbial keratitis. This bacterial corneal infection can rapidly progress to painful corneal ulcers, which, in highly severe cases, can result in permanent tissue scarring and lasting vision impairment. The specialist emphasised that the risk of developing these complications increases dramatically even if an individual only occasionally falls asleep while wearing their lenses.

To prevent these severe ophthalmic complications, Sood advised patients to practice consistent and proper contact lens hygiene. The physician emphasised that contact lenses are generally safe when used correctly, but stressed that the human eye was never biologically designed to sleep with them inside. He urged all users to seek immediate medical attention if they experience eye pain, redness, light sensitivity, or sudden changes in their vision.

What happens when you sleep with contact lenses on?

• The cornea depends on a steady supply of oxygen from the air to stay healthy.
• Contact lenses naturally restrict oxygen flow during the day, and sleeping in them reduces it further.
• This combination weakens the surface of the eye, making it easier for bacteria to cause a serious infection.

The biggest concern

• A major risk of improper contact lens use is microbial keratitis, an infection on the cornea.
• The infection can progress to a corneal ulcer, which can cause permanent scarring and affect vision.
• The risk of developing these complications increases even if sleeping in lenses only happens occasionally.

How to prevent complications?

• Remove contact lenses before sleeping or napping, even for short periods.
• Practise consistent, good contact lens hygiene at all times.
• Seek professional medical care early if you experience redness, pain, light sensitivity, or blurred vision.

Note: This article is based on user-generated content from social media, and the claims have not been independently verified. It is for informational purposes only and is not a substitute for professional medical advice. Readers should consult a doctor with any questions about a medical condition.