Storing contact lenses in water is unsafe and can cause serious eye infections and lens damage.
Why Water Is a Hazard for Contact Lenses
Contact lenses are delicate medical devices designed to sit directly on the eye’s surface. They require a sterile, specially formulated solution for cleaning and storage. Using plain water, tap or otherwise, poses significant risks. Water contains microorganisms, including bacteria and amoebae like Acanthamoeba, which can cling to lenses and lead to severe eye infections.
Water lacks the disinfecting properties contact lens solutions have, meaning it cannot kill germs or remove protein deposits effectively. When lenses are stored in water, they become breeding grounds for pathogens. This exposure can result in redness, pain, blurred vision, or even permanent damage requiring urgent medical care.
Moreover, water’s chemical composition differs vastly from saline or multipurpose lens solutions. The lack of buffering agents and preservatives means lenses stored in water may degrade faster or warp due to osmotic imbalances. This compromises lens shape and comfort during wear.
The Science Behind Lens Damage in Water
Contact lenses are typically made from hydrogel or silicone hydrogel materials designed to maintain moisture while allowing oxygen permeability. These materials respond differently when exposed to various liquids.
Water is hypotonic relative to the saline environment inside the eye and typical lens solutions. This difference causes lenses to swell as they absorb water molecules uncontrollably. Swollen lenses lose their intended curvature and thickness, affecting visual clarity.
Additionally, tap water often contains chlorine, minerals, and other impurities that interact chemically with lens polymers. Over time, these interactions weaken the lens structure, making them prone to tearing or distortion.
The swelling effect combined with microbial contamination creates a perfect storm for discomfort and increased risk of corneal abrasions or infections.
Risks of Using Water for Contact Lens Storage
Below is a table summarizing key risks associated with storing contact lenses in water:
| Risk | Description | Potential Consequences |
|---|---|---|
| Microbial Contamination | Water harbors bacteria and amoebae that cling to lenses. | Eye infections like keratitis; severe pain; vision loss. |
| Lens Swelling & Warping | Lenses absorb water causing shape distortion. | Blurry vision; discomfort; impaired fit. |
| Chemical Impurities | Minerals and chlorine react with lens material. | Lens degradation; tearing; reduced lifespan. |
| Lack of Disinfection | No antimicrobial agents present in plain water. | Accumulation of proteins & microbes; infection risk. |
Acanthamoeba Keratitis: The Hidden Danger
One particularly dangerous microorganism found in tap water is Acanthamoeba. This tiny amoeba can adhere stubbornly to contact lenses when stored or rinsed with water. It causes Acanthamoeba keratitis—a rare but devastating infection that attacks the cornea.
Symptoms include intense pain disproportionate to visible redness, light sensitivity, blurred vision, and excessive tearing. Treatment is difficult and prolonged; sometimes surgical intervention is necessary.
This infection highlights why “Can I Keep Contacts In Water?” must be answered decisively: never store or rinse your contacts with anything but approved sterile solutions.
The Proper Way to Store Contact Lenses
The safest storage method involves using multipurpose contact lens solutions specifically designed for cleaning, disinfecting, rinsing, and storing soft contact lenses. These solutions contain preservatives that kill harmful microorganisms while maintaining lens integrity.
Here’s a step-by-step guide for proper storage:
- Wash your hands thoroughly: Use soap without oils or lotions before handling lenses.
- Remove old solution: Always discard used solution from the case before refilling.
- Clean lenses: Rub each side gently with fresh solution even if labeled “no-rub.”
- Rinse thoroughly: Use fresh multipurpose solution to rinse away debris.
- Store properly: Place lenses in a clean case filled with fresh solution daily.
- Replace cases regularly: Change your lens case every three months at minimum.
Avoid topping off old solution because it reduces disinfecting power. Always use fresh solution each time you store your contacts.
The Role of Saline Solutions vs Multipurpose Solutions
Saline solutions are sterile saltwater mixtures used mainly for rinsing lenses after cleaning but do not disinfect them. Multipurpose solutions combine saline properties with disinfectants and cleaning agents.
Using saline alone for storage leaves microbes alive on the lens surface—defeating the purpose of safe storage. Multipurpose solutions ensure thorough disinfection while maintaining moisture balance.
The Consequences of Ignoring Proper Lens Care
Ignoring proper care by using water instead of approved solutions leads to complications ranging from mild irritation to severe medical emergencies:
- Mild Discomfort: Redness, dryness, itching caused by microbial buildup or distorted lenses.
- Bacterial Keratitis: Bacterial infections causing ulcers on the cornea requiring antibiotics.
- Acanthamoeba Keratitis: Difficult-to-treat amoebic infection risking permanent vision loss.
- Lens Damage: Warping leads to poor fit causing scratches on corneal surface.
- Permanent Vision Impairment: Untreated infections may scar the cornea irreversibly.
These consequences emphasize why “Can I Keep Contacts In Water?” must be answered firmly: no way!
The Myth About Sterile Bottled Water
Some believe bottled water might be safe since it’s filtered or purified. However, even sterile bottled water lacks disinfectants essential for killing microbes on contact lenses.
Using bottled water instead of approved solutions still risks contamination and swelling damage. Only use products labeled specifically for contact lens care.
The Science Behind Contact Lens Solutions vs Water: A Comparison Table
| Contact Lens Solution | Water (Tap/Bottled) | |
|---|---|---|
| Sterility | Kills bacteria & fungi effectively | Taps into environmental microbes freely present |
| Chemical Composition | Buffered saline with preservatives & lubricants | Poorly buffered; contains minerals & chlorine |
| Lens Compatibility | Keeps lenses hydrated without distortion | Makes lenses swell & warp over time |
| Shelf Life Once Opened | A few months recommended after opening (varies) | N/A – not intended for storage use at all |
| User Safety Level | High – recommended by eye care professionals | Low – high risk of infection & damage |
Key Takeaways: Can I Keep Contacts In Water?
➤ Water can harbor harmful microbes that irritate your eyes.
➤ Contacts should not be exposed to tap water to avoid infections.
➤ Swimming with contacts increases risk of eye irritation.
➤ Use proper lens solution for cleaning and storing contacts.
➤ Consult your eye care professional for safe lens practices.
Frequently Asked Questions
Can I Keep Contacts In Water Safely?
No, keeping contact lenses in water is unsafe. Water contains microorganisms that can cause serious eye infections and lacks the disinfecting properties needed to clean lenses properly.
Using water instead of sterile solutions increases the risk of contamination and damage to your lenses.
Why Is It Dangerous To Store Contact Lenses In Water?
Water harbors bacteria and amoebae like Acanthamoeba, which can cling to lenses and lead to severe eye infections. It also lacks preservatives that kill germs found in lens solutions.
This exposure can cause redness, pain, blurred vision, or even permanent eye damage.
How Does Water Affect Contact Lens Material?
Contact lenses absorb water and swell because water is hypotonic compared to lens solutions. This swelling changes the lens shape, causing discomfort and blurry vision.
Chemicals like chlorine in tap water can also weaken lens polymers, increasing the risk of tearing or distortion.
Can Storing Contacts In Water Cause Eye Infections?
Yes, storing contacts in water significantly raises the risk of eye infections. Microorganisms in water can cling to lenses and infect the cornea, leading to conditions like keratitis.
Such infections often require urgent medical treatment and can threaten vision if untreated.
What Is The Proper Way To Store Contact Lenses?
Contact lenses should always be stored in sterile, specially formulated contact lens solutions designed for cleaning and disinfecting. These solutions kill germs and maintain lens integrity.
Avoid using tap water or any non-sterile liquids to prevent infection and lens damage.
The Bottom Line – Can I Keep Contacts In Water?
The simple answer is no — storing or rinsing contact lenses in any type of water is unsafe and strongly discouraged by eye care experts worldwide. Water harbors harmful microorganisms that cause serious infections like bacterial keratitis and Acanthamoeba keratitis while also physically damaging your lenses through swelling and chemical interactions.
Only use FDA-approved multipurpose contact lens solutions designed specifically for cleaning, disinfecting, rinsing, and storing your contacts safely every day. Proper hygiene habits like washing hands before handling contacts and regularly replacing your lens case further reduce risks dramatically.
Your eyes deserve nothing less than safe practices backed by science—not shortcuts involving tap or bottled water that could lead to painful injuries or permanent vision loss. So next time you wonder “Can I Keep Contacts In Water?” remember this article’s facts: keep those contacts away from any kind of water at all costs!
Your vision depends on it!