Sleeping with Contact Lenses
Why Sleeping in Contact Lenses Is Risky
The cornea is the clear front surface of your eye, and it relies on oxygen from the air to stay healthy. Unlike other parts of your body, the cornea does not have blood vessels to deliver oxygen. Instead, it gets oxygen directly from the environment when your eyes are open.
When you sleep, your eyelids naturally reduce the amount of oxygen that reaches your cornea. Your eyes need this oxygen to repair cells, fight off germs, and maintain clear vision.
Contact lenses create a barrier between your cornea and the air around you. Even lenses designed to allow some oxygen through still reduce the total amount that reaches your eye. During sleep, when your eyelids are already closed, adding a contact lens creates a second barrier.
- Soft lenses reduce oxygen reaching the cornea during sleep, with the degree depending on lens material, thickness, and fit
- The cornea may swell when it does not get enough oxygen
- Swelling can cause blurry vision and discomfort when you wake up
- Repeated oxygen deprivation can lead to permanent changes in corneal tissue
- Chronic low oxygen can contribute to corneal neovascularization and inflammatory infiltrates
Your eyes produce tears that help wash away debris and bacteria throughout the day. When you sleep in contact lenses, the lens traps bacteria and other germs against your eye for hours. The low oxygen environment also makes it easier for harmful bacteria to multiply.
Studies consistently show a several-fold increase in serious infection risk with overnight wear compared with removing lenses nightly; exact risk varies by lens type and hygiene. These infections can develop quickly and may threaten your vision if not treated promptly. Overnight wear also increases risk of noninfectious inflammatory events (sterile infiltrates) that can mimic infection and still require prompt evaluation.
While sleeping in contacts is risky for everyone, certain factors can increase your chance of problems. We see higher complication rates in people who smoke, have dry eyes, or do not follow proper lens care routines.
- People with allergies or immune system conditions
- Those who wear lenses for longer than recommended during the day
- Contact lens wearers who swim or shower with their lenses in
- Anyone who reuses lens solution or does not clean their lens case regularly
What Can Happen When You Sleep in Contacts
Even one night of sleeping in your contact lenses can cause uncomfortable symptoms. When you wake up, you might notice that your eyes feel dry, gritty, or irritated. Your vision may be blurry or hazy until you remove your lenses and allow your eyes to recover.
Redness is another common sign that your cornea did not get enough oxygen overnight. These symptoms may improve after you take out your lenses and give your eyes a break, but they are warning signs that your eyes are under stress.
Bacterial keratitis is a severe infection of the cornea that we see more often in people who sleep in their contact lenses. This infection can develop rapidly, sometimes within 24 hours. Symptoms include severe pain, increased light sensitivity, heavy tearing, and thick discharge from the eye.
- Pseudomonas and Staphylococcus bacteria are common causes
- Fungal and Acanthamoeba infections are less common but can be vision-threatening, especially with any water exposure
- The infection can permanently damage your cornea and reduce vision
- Treatment requires strong antibiotic eye drops and close monitoring
- Some cases need antibiotics around the clock for the first few days
A corneal ulcer is an open sore on the surface of your eye. Sleeping in contacts can lead to ulcers because the reduced oxygen and trapped bacteria create ideal conditions for tissue breakdown. Corneal ulcers are extremely painful and can cause lasting vision problems.
If an ulcer forms in the center of your cornea, it may leave a scar even after the infection heals. Scarring in your line of sight can permanently blur your vision. In severe cases, corneal ulcers can lead to vision loss that requires a corneal transplant to restore sight.
We want you to recognize the red flags that mean you need immediate medical care. Remove the lens and seek same-day urgent eye evaluation for moderate to severe pain, light sensitivity, reduced vision, worsening redness, discharge, or a visible white or gray spot. Do not use leftover antibiotic drops or steroid drops unless specifically directed after an exam.
- Pain that continues or gets worse after removing your lenses
- Feeling like something is stuck in your eye that will not go away
- Seeing halos or rings around lights
- Increased sensitivity to light that makes it hard to keep your eyes open
- A white or gray spot visible on the colored part of your eye
Types of Contact Lenses and Overnight Wear
Daily wear soft contact lenses are designed to be removed every night before you go to bed. These lenses are made from materials that allow some oxygen to pass through, but not enough to keep your cornea healthy during sleep. Most soft lenses that people wear fall into this category.
If you currently wear daily wear lenses, you should take them out each evening and store them properly in fresh solution. Even a short nap with daily wear lenses increases your risk of complications.
The FDA has approved certain contact lenses for extended wear, which means you can sleep in them for a limited number of nights. These lenses are made from silicone hydrogel or other materials that transmit more oxygen than standard soft lenses. Our eye doctor may prescribe extended wear lenses for specific medical or lifestyle needs.
- Most extended wear lenses are approved for up to 6 nights/7 days (varies by brand)
- Some brands are approved for up to 30 days and nights of wear
- Follow your prescriber's instructions and the product labeling for when to remove, disinfect (if applicable), and replace lenses
- Not all patients are good candidates for extended wear lenses
Even though certain lenses are approved for overnight wear, wearing them while you sleep still carries higher risk than removing them nightly. Research shows that people who use extended wear lenses have more eye infections and complications than those who take their lenses out every night.
The approval means the lens material allows more oxygen through, but it does not make sleeping in contacts completely safe. We monitor extended wear patients more closely and watch for any signs of problems during regular checkups. Even with high oxygen-transmitting materials, closed-eye conditions and bacterial adherence to lenses still increase infection risk.
There are situations where the benefits of extended wear lenses may outweigh the risks. We might consider prescribing them for patients who have difficulty handling lenses due to arthritis or other physical limitations. Some people with irregular work schedules or those who travel frequently may also benefit.
Before recommending extended wear, we perform a thorough eye exam and discuss your medical history, lifestyle, and ability to follow care instructions. If we prescribe extended wear lenses, we schedule more frequent follow-up visits to check your eye health.
Certain specialty contact lenses are specifically designed for overnight use under close medical supervision. Orthokeratology (ortho-k) lenses are rigid gas permeable lenses worn overnight to temporarily reshape the cornea and correct vision during the day. These require strict hygiene protocols and regular follow-up visits to monitor corneal health.
Bandage contact lenses are sometimes placed by an eye doctor to protect the cornea after injury or surgery, and they may be intentionally worn overnight as part of treatment. These scenarios do not make unsupervised sleeping in standard daily wear contact lenses safe. Any overnight lens wear should only be done when specifically prescribed and monitored by your eye care professional.
What to Do If You Accidentally Sleep in Your Contacts
If you wake up and realize you slept in your contact lenses, do not panic. Keep your eyes closed for a moment and notice how they feel. Do not try to remove your lenses immediately if your eyes feel very dry or if the lenses seem stuck to your eyes.
- Blink several times to spread your natural tears across your eye
- Use preservative-free artificial tears if your eyes feel dry
- Wait a few minutes to allow moisture to return before touching your lenses
- Wash your hands thoroughly with soap and water before attempting removal
Once your eyes feel more comfortable, you can carefully remove your contact lenses. If the lens does not move easily when you try to slide it, do not force it. Apply more lubricating drops and wait another minute or two.
After removal, throw away the lenses if they are daily disposables. If you wear reusable lenses and your eyes feel normal after removal, clean and disinfect them exactly as directed (or discard and replace if you prefer the safest option). Do not reinsert the same day if you have redness, pain, or blurred vision. Give your eyes a rest for at least several hours, or ideally the entire day, before putting in new lenses. If the lens will not come out or seems stuck despite lubrication, seek urgent eye care rather than continuing to manipulate the eye.
Monitor your eyes closely after sleeping in your contacts. If symptoms persist beyond 1 to 2 hours after lens removal or are worsening at any point, seek same-day urgent evaluation. We can often see emergency cases the same day.
- Ongoing pain or a feeling of pressure in your eye
- Redness that spreads or becomes more intense
- Blurry vision that does not clear after a few hours
- Any discharge that is yellow, green, or thick
- Extreme light sensitivity that makes normal indoor lighting painful
- Any decrease in vision compared with your normal baseline
When you come in for an urgent eye exam, we will ask about your symptoms and how long you wore your contacts. We use specialized instruments to examine your cornea and check for signs of infection, swelling, or damage. A slit lamp microscope allows us to see detailed views of the front of your eye.
We may apply a safe orange dye called fluorescein to your eye, which helps us spot scratches or ulcers on your cornea. If we suspect an infection, we may take a sample from your eye to identify the specific bacteria. Treatment typically begins immediately and may include antibiotic drops; other medications (including anti-inflammatories) are used only when appropriate and under close supervision.
Safe Contact Lens Habits for Better Eye Health
Building a consistent habit of removing your contacts every night protects your eye health. We recommend linking lens removal to another part of your bedtime routine, such as brushing your teeth. Keep your lens case and solution in the same spot so you never have to search for them when you are tired.
If you sometimes fall asleep unexpectedly while watching television or reading, set a reminder on your phone for an hour before your usual bedtime. This extra prompt can help you remove your lenses before you get too drowsy to remember.
Cleaning your contact lenses correctly is just as important as removing them nightly. Always use fresh multipurpose solution each time you store your lenses. Never top off old solution or use water, saliva, or other liquids to rinse your contacts.
- Rub each lens gently with solution even if your product is labeled no-rub
- Rinse the lens thoroughly before placing it in your clean case
- Fill your case with enough fresh solution to completely cover both lenses
- Empty your case every morning and let it air dry upside down
- Replace your lens case every three months or sooner if it appears dirty
- Avoid 'get-the-red-out' drops for contact lens discomfort; use lubricating drops and seek care if symptoms persist
Follow the replacement schedule prescribed by our eye doctor. Daily disposable lenses should be thrown away after a single use and never worn a second time. Two-week lenses must be discarded after 14 days of wear, and monthly lenses should be replaced every 30 days.
The calendar date matters more than the number of times you actually wore the lenses. Once you open a fresh lens, contamination risk increases over time even when stored properly. Wearing lenses beyond their recommended lifespan increases your risk of infections and discomfort.
Water from taps, showers, swimming pools, hot tubs, and natural bodies of water can contain harmful microorganisms. A parasite called Acanthamoeba lives in water and can cause devastating eye infections in contact lens wearers. These infections are very difficult to treat and can lead to severe vision loss.
- Remove your contacts before showering or bathing
- Never rinse your lenses or case with tap water
- Take out your contacts before swimming or use tight swim goggles
- Avoid wearing contacts in hot tubs or natural water sources
We recommend at least annual comprehensive eye exams for all contact lens wearers. During these visits, we check your vision, examine your eye health, and make sure your current lenses still fit properly. Poorly fitting lenses can cause irritation and increase complication risks even if you follow all other guidelines.
If you experience any problems between regular exams, schedule an appointment rather than waiting for your next routine visit. Early detection and treatment of contact lens complications can prevent serious damage and help preserve your vision for years to come.
Frequently Asked Questions
Even short naps with your lenses in can reduce oxygen to your cornea and increase infection risk. We advise removing your contacts before any planned sleep, including brief naps, to protect your eye health.
Sleeping in contacts is never risk-free; overnight wear should only be done with lenses specifically prescribed for it and with appropriate follow-up. Some patients tolerate extended wear better than others. Individual factors like tear production, eyelid anatomy, and overall health affect your personal risk level, which is why we evaluate each patient carefully before considering extended wear options.
Occasional overnight wear still exposes you to the risk of serious infections and corneal damage each time it happens. While one night may not cause noticeable problems, complications can develop after any period of sleeping in lenses, so we encourage consistent nightly removal.
Daily disposable lenses are designed for single-use only and should never be worn for more than one day, whether you sleep in them or not. Reusing daily lenses dramatically increases contamination and infection risk because these lenses are not made to withstand cleaning or overnight wear.
Rewetting drops help with dryness and comfort during the day, but they do not provide enough oxygen to make overnight wear safe. The main risks of sleeping in contacts come from reduced oxygen and trapped bacteria, which eye drops cannot prevent.
Do not reinsert your lenses if your eye is red or painful. Do not patch the eye or use leftover prescription drops, especially steroid drops, without being directed by an eye care professional after an exam. Seek same-day urgent evaluation for any moderate to severe pain, light sensitivity, vision changes, or worsening redness.
Getting Help for Sleeping with Contact Lenses
If you have questions about your contact lens routine or have experienced problems from sleeping in your lenses, we encourage you to reach out to our eye doctor. We are here to help you enjoy the benefits of contact lenses while protecting your vision and eye health for the long term.