Swimming with Contact Lenses: Risks and Alternatives
Why Water and Contact Lenses Do Not Mix
Eye care professionals strongly advise against wearing contact lenses while swimming. Water from pools, oceans, lakes, and hot tubs can introduce harmful microorganisms to the surface of your lenses and the delicate tissues of your eyes. With an estimated 45 million contact lens users in the United States, representing roughly 16 percent of adults (Vision Center; CDC, 2024), understanding these risks is important for a large portion of the population.
Contact lenses are designed to sit on a thin layer of your natural tear film. When water enters the eye, it disrupts this tear layer and allows contaminants to become trapped between the lens and the cornea, which is the clear front surface of the eye. Soft contact lenses are especially porous and can absorb water along with the bacteria, fungi, and parasites it may contain. Once these organisms are held against the cornea by the lens, they have extended time to cause damage.
No body of water is considered safe for contact lens wear. Each environment carries its own hazards.
- Swimming pools and hot tubs contain chlorine, which does not eliminate all microorganisms and can itself irritate the eyes
- Lakes, rivers, and ponds harbor higher concentrations of bacteria, parasites, and organic debris
- Ocean water introduces salt, sand, and marine bacteria that can adhere to lens surfaces
- Tap water and shower water contain trace organisms, including Acanthamoeba, that can cause serious corneal infections
Soft lenses absorb water readily, which allows microorganisms to bind to the lens material and remain in prolonged contact with the cornea. Rigid gas-permeable (RGP) lenses are less absorbent but can still trap debris beneath them and may dislodge more easily in water. Neither lens type is safe to wear while swimming without additional protection. If you are unsure which type of lens you wear, reviewing your contact lens prescription with our optometrist can help clarify your options.
Infections Linked to Swimming with Contact Lenses
Bacterial keratitis is an infection of the cornea commonly associated with contact lens wear in contaminated water. Pseudomonas aeruginosa, a bacterium found in pools and natural bodies of water, is one of the most frequent causes. Symptoms include eye pain, redness, light sensitivity, and blurred vision. Bacterial keratitis typically responds to antibiotic eye drops, but delayed treatment can lead to corneal scarring and permanent vision changes.
Fungal keratitis develops when fungal spores found in soil and organic-rich water come into contact with the cornea. This type of infection progresses more slowly than bacterial keratitis but is also harder to treat. Antifungal medications are required, and recovery may take weeks or months. You face a higher risk if you swim in natural water sources while wearing contact lenses.
Swimming with contacts can also cause conjunctivitis, commonly known as pink eye, from bacterial or viral organisms in the water. While conjunctivitis is usually less serious than keratitis, it still causes uncomfortable redness, discharge, and irritation.
If you experience any of the following symptoms after swimming with contact lenses, you should see our eye doctor as soon as possible.
- Persistent redness or pain that does not improve within a few hours
- A white or cloudy spot visible on the cornea
- Increasing light sensitivity or tearing
- Worsening or sudden blurred vision
- Discharge or crusting around the eye
Acanthamoeba Keratitis and Contact Lens Wear
Acanthamoeba is a microscopic, single-celled parasite found in nearly all freshwater environments, including tap water, well water, lakes, and poorly maintained pools. It can also survive in soil and air. While Acanthamoeba is harmless when it stays outside the eye, it becomes dangerous when it reaches the corneal surface, especially when a contact lens traps it there.
The parasite adheres to the contact lens surface and then penetrates the outer layer of the cornea. Once it reaches the corneal tissue, it feeds on the cells and causes progressive destruction. Acanthamoeba can also form cysts, which are dormant, hard-shelled structures that resist most standard disinfectants and medications. This ability to encyst is what makes the infection so challenging to eliminate.
Early symptoms of Acanthamoeba keratitis include severe eye pain that seems disproportionate to the visible signs, excessive tearing, light sensitivity, and blurred vision. The condition is sometimes initially misdiagnosed as herpes keratitis or bacterial keratitis because the early appearance can look similar. Diagnosis usually requires specialized corneal cultures or confocal microscopy performed by an experienced eye care provider.
Treatment involves intensive antiseptic eye drops, often applied hourly in the initial stages, and may continue for several months. In severe or advanced cases, the infection can cause permanent corneal scarring that may require a corneal transplant to restore vision. The best defense against Acanthamoeba keratitis is prevention, and removing contact lenses before any water exposure is the single most effective preventive step.
Wearing Goggles Over Contact Lenses While Swimming
Swim goggles that fit snugly and create a watertight seal around each eye prevent pool, lake, or ocean water from reaching the lens surface. This barrier significantly reduces, though it does not completely eliminate, the chance of waterborne organisms contacting your lenses. You should test goggles for leaks before relying on them in the water.
Not all goggles provide the same level of protection. Look for goggles with a silicone gasket that conforms closely to the skin around the eye socket. Avoid goggles that feel loose, leave gaps, or allow water to seep in during head turns or diving. Goggles designed for competitive or lap swimming typically offer a tighter fit than recreational models.
Even with goggles, some water may enter the eye during splashing, removing the goggles, or if the seal shifts. For this reason, goggles over contacts should be seen as a risk-reduction strategy rather than a guarantee of safety. If you have a history of corneal issues or compromised eye health, you should discuss water activities with our optometrist before relying on goggles alone.
Safer Alternatives to Wearing Contacts in the Water
Prescription swim goggles are the most popular alternative to wearing contact lenses in the water. These goggles have corrective lenses built in, so you can see clearly underwater without wearing contacts at all. Off-the-shelf models are available in common sphere powers, while custom options can accommodate astigmatism and larger prescriptions. Our optometrist can help determine the correct power for your prescription goggles based on your most recent eye exam.
If you are interested in a long-term solution, laser vision correction may reduce or eliminate your dependence on contact lenses for activities like swimming. This option is worth discussing with our eye doctor if you frequently find yourself in situations where contacts are impractical or risky.
Beyond swimming, it is important to avoid wearing contacts in hot tubs, saunas, and while showering. Always wash and dry your hands thoroughly before handling lenses. Never rinse or store your contact lenses in tap water. Keeping up with annual comprehensive eye exams ensures that any early signs of contact lens-related complications are caught and addressed quickly.
Frequently Asked Questions
Chlorinated pool water can cause your lenses to tighten on the cornea, leading to discomfort, redness, and blurred vision. More importantly, chlorine does not kill every organism in the water, so bacteria or parasites may become trapped beneath the lens. If your eyes feel irritated after pool water exposure, remove your lenses as soon as possible, discard them if they are disposable, and rinse your eyes with preservative-free saline or artificial tears.
Daily disposable lenses offer a slight practical advantage because you can discard them immediately after leaving the water, eliminating any organisms that may have attached to the lens surface. However, they do not prevent microorganisms from reaching the cornea during the time they are worn in the water. Daily disposables should still be paired with well-sealed goggles, and removing lenses before swimming remains the safest choice.
If you did swim with your lenses in, you should remove and discard them as soon as you exit the water. Do not continue wearing lenses that have been exposed to pool, lake, or ocean water, even if they feel comfortable. After removing the lenses, rinse your eyes with preservative-free artificial tears and monitor for any symptoms of irritation or infection over the following 24 to 48 hours.
For many people, prescription goggles are a reliable solution for seeing clearly in the water without wearing contact lenses. They eliminate the infection risks associated with wearing contacts while still providing functional vision for lap swimming, snorkeling, and water sports. Our optometrist can help determine the correct power for your prescription goggles based on your most recent exam.
If you find that contact lenses frequently limit your activities, you may want to explore vision correction procedures that reduce or eliminate the need for lenses altogether. Options such as laser vision correction can provide lasting results for eligible candidates. Scheduling a consultation with our eye doctor is a good first step to understanding which options may be appropriate for you.
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