Swimming with contact lenses is a bad idea if you want to protect your eyes. Contact lenses are medical devices that sit directly on the surface of your eye, and water — whether from a pool, ocean, lake, or hot tub — can carry microorganisms that get trapped under the lens. That trap creates a direct path for infection.
The safest approach is simple: remove your contacts before you get in the water. If you need clear vision while swimming, prescription goggles or daily disposable lenses worn with tight-fitting waterproof goggles are the alternatives most eye care professionals recommend. Never open your eyes underwater while wearing contacts.
Why Is Swimming With Contacts Risky?
The cornea — the clear front surface of your eye — is normally protected by a thin tear film that washes away debris and microbes. A contact lens disrupts that natural defense. It sits on the cornea and creates a small space between the lens and the eye where water can pool.
That trapped water is the problem. Pool water, lake water, ocean water, and hot tub water all contain microorganisms. Chlorine kills many of them, but not all, and not instantly. Acanthamoeba is a free-living amoeba found in soil, fresh water, and sometimes in poorly maintained pools and hot tubs. It can attach to a contact lens and cause a corneal infection called Acanthamoeba keratitis.
This infection is rare but serious. It is difficult to treat, painful, and in some cases can lead to permanent vision loss or the need for a corneal transplant. The CDC has identified swimming with contacts as a major risk factor for this infection.
Bacterial infections are more common. Pseudomonas aeruginosa is a bacterium that thrives in water and can cause severe corneal ulcers in contact lens wearers. Symptoms include redness, pain, sensitivity to light, and blurred vision. These infections can progress quickly and require urgent medical treatment.
The risk is not limited to natural water. Even properly chlorinated pools carry some risk because chlorine does not eliminate every pathogen, and the lens can trap organisms against the eye before the chlorine has time to act.
What Happens If Water Gets Under Your Contact Lens?
Water getting under a lens does not automatically mean you will get an infection. But it does mean you have introduced a potential pathogen directly onto your cornea, and the lens is holding it there.
The tear film normally flows across the eye and drains through the tear ducts, carrying away contaminants. A contact lens blocks that flow. Microorganisms that would ordinarily be washed away can instead stay in contact with the corneal surface for an extended period.
If the cornea has even a tiny scratch or abrasion — which can happen from the lens itself, from sand, or from rubbing your eyes — the barrier is broken. That gives bacteria or amoebae an entry point into the deeper layers of the cornea.
Symptoms of an infection may not appear immediately. Some develop within hours. Others take days. Watch for:
- Eye pain that gets worse instead of better
- Redness that increases
- Blurred vision or sensitivity to light
- A feeling that something is stuck in your eye
- Discharge or excessive tearing
If any of these occur after swimming with contacts, remove the lens and see an eye doctor right away. Do not wait to see if it improves on its own. Corneal infections can worsen rapidly, and early treatment makes a significant difference in outcomes.
What Are the Safest Options for Swimming With Contacts?
The safest option is to not wear contacts in the water at all. Prescription swimming goggles are available and correct your vision without any lens touching your eye. They come in a range of prescriptions and can be ordered online or through an optical shop.
If you must wear contacts while swimming, the approach that carries the least risk is daily disposable lenses worn under tight-fitting waterproof goggles. The goggles create a seal that keeps water away from the eyes. Daily disposables are discarded after swimming, so any organisms that might have contacted the lens are thrown away with it.
This is not a zero-risk approach. Goggles can leak. They can be pulled off by a wave or during a dive. If water gets in, the lens is exposed. But it reduces risk compared to wearing reusable contacts with no eye protection.
Reusable contacts are a worse choice for swimming. They stay in your lens case and are worn again, which means any microorganisms that attach to them have another chance to reach your eye. If you do swim in reusable lenses, some eye care professionals recommend discarding them afterward — but the evidence on whether that fully eliminates risk is limited. The more reliable step is to avoid the situation.
Here is a comparison of the options:
| Option | Risk Level | Notes |
|---|---|---|
| No contacts, no goggles | Lowest eye infection risk | Vision not corrected underwater |
| Prescription swimming goggles | Low | Corrects vision, no lens on eye |
| Daily disposables + waterproof goggles | Moderate | Discard lenses after swimming |
| Reusable contacts + goggles | Higher | Lenses must be cleaned and stored properly |
| Contacts with no eye protection | Highest | Strongly discouraged |
Can You Swim With Contacts If You Keep Your Eyes Closed?
Keeping your eyes closed reduces the chance of water reaching the lens, but it does not eliminate it. Water can seep in around the eyelids. Splashes, waves, and submerging your head can all introduce water even with eyes shut.
If you accidentally open your eyes underwater while wearing contacts, the exposure is immediate. Remove the lenses as soon as you can, rinse your eyes with sterile saline if available, and monitor for symptoms. If you develop pain, redness, or blurred vision, see an eye doctor.
Some people believe that chlorine kills everything in pool water, so swimming with contacts in a pool is safe. That is not accurate. Chlorine reduces many pathogens, but it does not sterilize water. Acanthamoeba and some bacteria can survive in chlorinated water, especially if chlorine levels are not properly maintained.
What About Swimming in the Ocean or a Lake?
Natural bodies of water carry a broader range of microorganisms than pools. Lakes, rivers, and oceans contain bacteria, amoebae, fungi, and other organisms that are not present in treated water. The risk of eye infection from swimming with contacts in natural water is generally considered higher than in a well-maintained pool.
Acanthamoeba is commonly found in fresh water — lakes, rivers, and ponds. Ocean water contains different organisms, including Vibrio species, which can cause severe infections in open wounds but are less commonly associated with contact lens-related eye infections. The overall risk in any natural water setting is not zero.
If you are swimming in a lake or ocean and wearing contacts, the same rules apply: use daily disposables, wear waterproof goggles, and discard the lenses afterward. If water gets in your eyes, remove the lenses and monitor for symptoms.
What Should You Do If You Swam With Contacts and Your Eye Hurts?
Remove the contact lens immediately. Do not put it back in. If you have sterile saline solution, rinse your eye gently. Do not use tap water to rinse your eye or your lens case.
See an eye doctor as soon as possible. Tell them you were swimming with contacts. This information matters because it changes what infections they consider. Acanthamoeba keratitis, for example, requires different treatment than a typical bacterial infection, and it is easy to miss if the doctor does not know about the water exposure.
Do not try to treat it yourself with over-the-counter eye drops. Some drops can make certain infections worse. Do not wait to see if it gets better. Corneal infections can progress quickly, and delays in treatment are associated with worse outcomes.
If you wear contacts and experience eye pain, redness, or blurred vision — even if you are not sure water got in — remove the lenses and call your eye doctor. These symptoms are not normal and should not be ignored.
Frequently Asked Questions
Can I swim with daily disposable contacts?
Daily disposables worn under tight-fitting waterproof goggles carry lower risk than reusable lenses, but they are not risk-free. If water gets in your eyes, remove and discard the lenses immediately.
What happens if I open my eyes underwater with contacts in?
Water can carry bacteria and amoebae that get trapped under the lens against your cornea. Remove the lenses as soon as possible and watch for pain, redness, or blurred vision.
Can I get an eye infection from swimming with contacts in a chlorinated pool?
Yes. Chlorine reduces many pathogens but does not sterilize water, and organisms like Acanthamoeba can survive in pools that are not properly maintained. The lens traps water against your eye, increasing infection risk.
How long after swimming with contacts would infection symptoms appear?
Symptoms can appear within hours or take several days. Any eye pain, redness, or blurred vision after swimming with contacts should be evaluated by an eye doctor promptly.
