Why You Shouldn't Store Contact Lenses in Saline Solution (And What to Use Instead)

Storing contact lenses in saline solution might seem like a safe option, but saline solution lacks the disinfecting properties needed for proper contact lens care. Contact solution is not the same as saline solution and serves a different purpose. Saline can rinse your lenses, but it cannot kill harmful germs that lead to severe eye infections. Understanding the difference between saline solution vs contact solution protects your eye health. This piece explains why saline falls short, what contact solution substitute options work best, and how to clean contacts the right way to avoid serious complications.

Why Saline Solution Isn't Enough for Contact Lens Storage

Saline Solution vs Contact Solution: Understanding the Difference

Many contact lens wearers assume saline solution and contact lens solution are interchangeable, but they serve different purposes. Contact solution is not necessarily saline solution and may not contain any saline. Saline solution consists of just salt and water. This creates a pH-balanced saltwater mixture that's sterile and gentle. Contact lens solution contains a complex formulation of disinfectants, surfactants (cleaning agents) and preservatives. Sometimes it includes lubricating ingredients.

The disinfectant in contact lens solution kills pathogens that cause infection. The surfactant loosens dirt and debris on your lenses. The wetting solution keeps lenses hydrated, and the preservative will give the product effectiveness until its expiration date. Saline solution has none of these components. It's sterile saltwater that matches the salt concentration in your eyes.

What Saline Solution Does (and Doesn't Do)

Saline solution can rinse your lenses before insertion and is sometimes recommended as a final rinse after using hydrogen peroxide-based cleaning systems. Buy a commercial preparation approved for contact lens use if your eye care provider suggests using saline as part of your lens-cleaning regimen. Never attempt to make your own mixture at home. Homemade versions have been linked to serious corneal infections.

But saline solution does not contain any cleansing agents, so you should never use it to clean, disinfect or store your lenses. The CDC makes this clear: saline solution does not disinfect contact lenses. Saline is sterile when purchased, but it lacks antimicrobial agents and preservatives that kill germs. Any bacteria, fungi or other harmful organisms on your lenses remain alive when you place them in saline. Bacteria multiply quickly in saline during overnight storage and create a breeding ground for infection.

The Risks of Storing Contacts in Saline Solution

Contact lenses stored in saline solution increase your risk of eye infections by a lot because saline does not maintain sterility. Contact lenses pick up dirt, bacteria and oil from your hands and surroundings. They also harbor natural protein buildup from your eye's surfaces. Germs stay alive and multiply when lenses sit in saline overnight. Those lenses transfer harmful microorganisms straight to your cornea when you put them back in.

Acanthamoeba keratitis is one especially serious infection that occurs when tiny amoebas stick to your contact lenses and case. Doctors find this infection very difficult to treat, and it can damage your vision in severe cases. Lenses stored in saline may expose your eyes to harmful bacteria or debris. This can cause redness, irritation or infection. Remove the lenses right away if this happens and contact your eye care provider if symptoms persist.

What to Use Instead of Saline Solution for Contact Lens Care

Proper contact lens care requires solutions designed to disinfect and protect your lenses. Three main types of products exist for contact lens care: multipurpose solutions, hydrogen peroxide-based systems, and daily cleaners. Each serves a distinct purpose in maintaining lens hygiene and eye health.

Multipurpose Contact Solution

Multipurpose solutions function as an all-in-one care system for soft contact lenses. These products clean, rinse, disinfect, and store your lenses using a single bottle. This convenience makes multipurpose solutions the most popular choice among contact lens wearers. Roughly 67 percent of eye doctors in the United States recommended multipurpose contact lens solutions for lens cleaning and disinfection in 2017.

Wash and dry your hands really well to start the cleaning process. Place at least 3 drops of multipurpose solution on each side of your lens surface. Rub gently for 20 seconds, even though many bottles claim "no-rub" functionality. Eye care professionals still recommend rubbing to ensure complete debris removal. Rinse each side of the lens for 5 seconds with fresh solution. Then place your lenses in a clean, empty storage case filled with fresh multipurpose solution.

Your lenses need to soak for at least 4 hours to achieve proper disinfection. Never mix fresh solution with old or used solution in the case. This reduces disinfection effectiveness. Multipurpose solutions work for all soft contact lenses, including silicone hydrogel lenses. They contain disinfectants and surfactants for cleaning. Often they include lubricating ingredients that provide moisture to your lenses.

Hydrogen Peroxide-Based Contact Lens Solutions

Hydrogen peroxide-based systems offer preservative-free cleaning for contact lenses. These solutions appeal to people who experience allergic reactions or sensitivity to preservatives found in multipurpose products. The active ingredient uses 3 percent hydrogen peroxide concentration to disinfect lenses. It breaks down proteins and removes debris.

The cleaning process requires special attention because hydrogen peroxide causes stinging and burning if it touches your eye. You must neutralize the solution after disinfection. This converts the hydrogen peroxide into harmless saline. Place your lenses in the special case provided with the solution and soak them for 6 to 8 hours. Most products available today use a one-step process with a built-in neutralizer in the case, which is a platinum-coated catalytic disk. Two-step systems require adding a neutralizing tablet after cleaning.

Hydrogen peroxide solutions penetrate microbial films and create a deeper clean than multipurpose solutions can achieve. They show greater knowing how to fight acanthamoeba keratitis, a rare infection that can cause blindness. But the cleaning process takes longer because lenses must remain in the solution for at least 4 to 6 hours. Never rinse lenses with hydrogen peroxide before insertion. Always use the special case that comes with the product.

Daily Cleaners for Contact Lenses

Daily cleaners serve a different function from multipurpose or hydrogen peroxide solutions. These products clean your lenses and loosen and remove deposits and debris, but they do not disinfect. Apply a few drops to your palm, then rub the lens as directed on both sides. Daily cleaners provide a more detailed clean compared to only rubbing with storage solution. This makes them beneficial for people with sensitive eyes.

You still need additional products like multipurpose solution to rinse, disinfect, and store your lenses after using a daily cleaner. Never store lenses in daily cleaner alone because it lacks antimicrobial properties. Daily cleaners work best as part of a detailed care routine when you need extra cleaning power beyond standard multipurpose solution maintenance.

How to Clean Contacts Properly

Cleaning contact lenses correctly protects your eyes from infections that can threaten your vision. You must clean and disinfect any contact lens you remove from your eye before putting the lens back in.

Step-by-Step Guide for Cleaning Contact Lenses

Wash your hands with soap and water first, then dry them with a lint-free towel before touching your contact lenses. Antibacterial soap works best. Avoid oil-based or moisturizing soaps that leave residues on your skin and transfer to your lenses. Take one lens out and place it in the palm of your hand. Apply multipurpose contact lens solution and rub the lens for about 20 seconds on each side. Whatever solution type you buy, use a "rub and rinse" cleaning method, even if the bottle claims "no-rub" functionality. Studies show that rubbing remains the quickest way to remove debris.

Rinse your contact lens with solution for about 10 seconds on each side. Put the contact lens into a clean, dry lens case and fill the well with fresh multipurpose solution. Do the same with your other eye's lens. Soak the lenses according to the manufacturer's recommended time, which varies by brand but ranges between 4 and 8 hours. Most people soak their lenses overnight to meet this requirement.

Cleaning Your Contact Lens Case

Your contact lens case needs daily cleaning to prevent bacteria buildup. Empty all old solution from the case after you insert your lenses in the morning. Rinse the case with fresh contact lens solution, never tap water. Bacteria love moisture, and poor case drying causes at least half of medical cases related to contact lens complications.

Use your fingertip with multipurpose solution to rub away any deposits. Rinse the case again with more solution to release lingering particles. Leave the empty case open and upside down on a clean towel or tissue to air dry. Get a new case at least every 3 months, or right away if it becomes cracked or damaged.

Common Mistakes to Avoid When Cleaning Contacts

Never reuse or top off old solution. Used lens solution loses sterility and becomes susceptible to bacteria growth that causes eye infections. Topping off reduces the disinfecting power of fresh solution and allows bacteria to multiply. Never rinse or store contacts in water, whether tap or sterile. Water contains microorganisms like Acanthamoeba that cause serious infections. Do not put contacts in your mouth to wet them, as saliva is not sterile. Always use fresh solution each time you clean your lenses. Never pour contact lens solution into a different bottle, which compromises sterility.

What Can I Use Instead of Contact Solution in an Emergency

Running out of contact solution happens, especially when you're traveling or staying somewhere overnight. Despite the risks, certain temporary substitutes can keep your lenses hydrated until you access proper contact solution.

Using Saline Solution as a Temporary Substitute

Sterile saline solution works as a short-term emergency option for storing contact lenses. The formula keeps your lenses hydrated and prevents them from drying out overnight. But saline lacks cleaning agents and cannot disinfect your lenses like multipurpose solution does. You can use saline for one night only, then switch to proper contact lens solution as soon as possible.

Note that saline solution stored your lenses without killing bacteria or removing debris accumulated during wear. Clean and disinfect them really well with proper contact solution before you insert lenses stored in saline. This step removes any microorganisms that multiplied during storage.

What to Do If You Don't Have Contact Solution Overnight

Several alternatives exist for emergency storage if you cannot throw your lenses away and lack access to stores before bed. Hydrogen peroxide or saline nasal spray can store your lenses temporarily. These substitutions work for one night maximum until you get contact lens solution.

The safest choice remains discarding your lenses if you have no proper solution available. Contact lenses qualify as medical devices, and temporary shortcuts risk permanent eye damage. Remove them right away if your lenses cause discomfort and you lack solution, and use lubricating drops designed for contact lens wear to relieve irritation. Never attempt homemade saline solutions, as these contain fine salt grains that damage contact lenses.

Why You Should Never Put Contacts in Water

Water exposure creates serious dangers for contact lens wearers. Tap water harbors microorganisms that cause severe eye infections. Bottled and distilled water fail to provide safe alternatives, as neither is sterile. Water contains bacteria and parasites, especially Acanthamoeba, a microscopic organism found in tap water, lakes, and oceans.

Water causes soft contact lenses to absorb moisture, swell, and change shape. This swelling makes lenses stick to your eye uncomfortably and creates microscopic breaks in your cornea. These tiny tears allow microorganisms entry points for infection. The changed fit from swollen lenses causes discomfort and vision problems.

Acanthamoeba keratitis represents a dangerous water-borne infection. Doctors find this corneal infection resistant to treatment, sometimes requiring a year or more of care. Severe cases may necessitate corneal transplants or result in blindness. Of course, water should never touch your contact lenses, even briefly.

Tips to Prevent Running Out of Contact Solution

Keeping backup contact lens supplies prevents the stress and eye health risks that come from scrambling for emergency substitutes. Pack backup supplies including spare contacts and solution along with an extra lens case. Your eye care provider recommends visiting annually to ensure your prescription stays current. On top of that, replace your contact lens case every three months to prevent bacterial buildup.

Keep Backup Supplies on Hand

Store extra contact solution at home, at work, and in your car. Running out becomes nowhere near as likely when you maintain multiple supply locations. To cite an instance, keeping a spare bottle in your desk drawer ensures you can clean your lenses if you work long hours or stay overnight unexpectedly.

Travel preparations require extra attention. Bring more contact lenses and solution than you think you'll need. Unplanned delays or lost luggage can leave you without essentials, so having backups is needed. Your packing list should include an extra case and rewetting drops along with travel-sized bottles of multipurpose solution. Keep all contact lens supplies in your carry-on bag rather than checked luggage. You'll still have everything needed to care for your lenses if airlines lose or delay your checked baggage.

Travel-Sized Contact Solution Options

Travel-sized bottles hold about 2 ounces of solution, which lasts one to two weeks. Buy sealed travel-size bottles instead of transferring solution from larger containers. Contact solution remains sterile in its original packaging, but transferring it yourself introduces contaminants that risk eye infections.

TSA allows larger amounts of medically necessary liquids in reasonable quantities, but you must declare them at security checkpoints to inspect. Some contact lens solutions contain chemicals that trigger alarms during screening and may not pass through checkpoints. TSA recommends placing contact lens solutions over 3.4 ounces in checked baggage. You can also pack a regular-sized bottle in checked luggage to ensure you have your preferred brand and formula, whether traveling domestically or internationally.

Conclusion

Saline solution might seem convenient, but it puts your eye health at serious risk. The formula lacks the disinfecting agents needed to kill harmful bacteria and protect your vision from dangerous infections. Contact lens solution exists for a specific purpose: cleaning, disinfecting and safely storing your lenses overnight.

Multipurpose solutions or hydrogen peroxide-based systems designed for contact lens care are what you should use. Rub and rinse your lenses with fresh solution every day, and replace your case every three months. Backup supplies at home and while traveling help you avoid emergency situations. Your eyes deserve the protection that contact solution provides, so invest in the right products and stick to proven care routines.