Eye Doctors Issue Urgent Warning About Overnight Contact Lens Use

Health Points

• Sleeping in contact lenses increases the risk of serious eye infections by up to 8 times, even with FDA-approved extended-wear lenses
• Most contact lenses significantly reduce oxygen flow to the cornea during sleep, creating conditions that promote bacterial growth and potentially sight-threatening complications
• Eye care professionals recommend removing all contact lenses before bed and following strict hygiene protocols to protect long-term eye health

Many Americans who wear contact lenses have been tempted to sleep in them after a long day, but eye care professionals are issuing a clear warning: the convenience isn’t worth the risk. Even a single night of sleeping in contacts can lead to serious complications that may permanently damage vision.

The practice of overnight contact lens wear has become increasingly common, with millions of Americans occasionally or regularly sleeping in their lenses. Yet ophthalmologists and optometrists emphasize that this habit poses significant dangers to eye health, regardless of the type of contact lenses being used.

“The risk of infection increases dramatically when you sleep in contact lenses,” explains Dr. Rebecca Taylor, an ophthalmologist and clinical spokesperson for the American Academy of Ophthalmology. “Your eyes need oxygen, and when you close your eyelids with contacts in, you’re creating an environment where bacteria can thrive.”

The cornea, the clear front surface of the eye, relies on oxygen from the air to stay healthy. Contact lenses create a barrier that reduces oxygen flow, and this effect becomes more pronounced during sleep when the eyelids are closed. This oxygen deprivation can weaken the cornea’s natural defenses against infection.

Research has consistently demonstrated the elevated risks associated with sleeping in contact lenses. Studies show that overnight lens wear increases the risk of microbial keratitis—a serious corneal infection—by up to eight times compared to daily wear. These infections can cause severe pain, vision loss, and in extreme cases, may require corneal transplantation.

“We see patients who thought it would be fine for just one night, and they end up with infections that are difficult to treat,” says Dr. Michael Repka, a professor of ophthalmology at Johns Hopkins University School of Medicine. “The bacteria that cause these infections can be very aggressive.”

Even contact lenses specifically approved by the FDA for extended wear carry risks when worn overnight. While these lenses are designed with higher oxygen permeability than standard daily wear lenses, they still don’t eliminate the infection risk entirely. Medical professionals note that the approval for extended wear doesn’t necessarily mean it’s the safest choice for eye health.

The dangers extend beyond bacterial infections. Sleeping in contacts can lead to a range of complications including corneal ulcers, blood vessel growth into the cornea (neovascularization), and chronic inflammation. These conditions can cause permanent changes to the eye’s structure and function.

“Your cornea is trying to heal itself every night during sleep,” explains Dr. Taylor. “When you leave contacts in, you’re interfering with that natural healing process.”

Proper contact lens hygiene forms the foundation of safe wear. Eye care professionals recommend a strict routine: remove lenses before sleep, clean them with fresh solution (never water), and replace them according to the prescribed schedule. Hands should always be washed thoroughly before handling lenses.

For those who occasionally fall asleep in their contacts, experts advise against immediately removing the lenses upon waking. The lenses may have adhered to the cornea during sleep, and forcing them off can cause damage. Instead, use lubricating eye drops to rewet the lenses and wait a few minutes before gently removing them.

“If you wake up with your contacts in and your eyes feel dry or uncomfortable, don’t panic and try to rip them out,” advises Dr. Repka. “Take your time and make sure they’re properly lubricated first.”

Anyone experiencing symptoms such as eye pain, redness, excessive tearing, light sensitivity, or vision changes while wearing contacts should remove the lenses immediately and contact an eye care professional. These symptoms may indicate an infection or other serious complication requiring prompt medical attention.

The Centers for Disease Control and Prevention estimates that approximately 45 million Americans wear contact lenses, and studies suggest that a significant percentage admit to sleeping in them at least occasionally. Public health officials have launched educational campaigns to raise awareness about proper contact lens care and the risks of overnight wear.

For individuals who find daily lens removal inconvenient, eye doctors recommend exploring alternative vision correction options. Daily disposable contact lenses, which are discarded after each use, offer enhanced convenience and reduced infection risk. LASIK and other refractive surgery options may eliminate the need for corrective lenses altogether for suitable candidates.

“We have so many options available now for vision correction,” notes Dr. Taylor. “If you’re consistently tempted to sleep in your contacts, it’s worth discussing alternatives with your eye doctor.”

The message from eye care professionals remains consistent and clear: protecting long-term vision health requires following recommended contact lens care guidelines. While sleeping in contacts might seem harmless in the moment, the potential consequences can be severe and lasting. Taking a few minutes each night to properly remove and care for contact lenses is a small investment in preserving precious eyesight for years to come.