Why Proper Contact Lens Storage Matters

Your contact lenses are medical devices that sit directly on your eyes. How you store them when they are not in use has a direct impact on your vision, comfort, and the health of your corneas. Improper storage is one of the leading causes of contact lens–related eye infections, including microbial keratitis, which can cause permanent vision loss. This guide provides thorough, step-by-step instructions, along with the science and best practices behind each action, so you can keep your lenses safe and your eyes healthy.

Step 1: Assemble Your Contact Lens Care Kit

Having the right tools within reach and in good condition is the first step toward mistake-free storage.

  • A clean, dedicated contact lens case. Replace every three months without exception. If the case cracks or becomes cloudy, replace it immediately.
  • Fresh multipurpose contact lens solution. Never top off old solution. Bottles should be kept tightly closed when not in use and discarded by the expiration date printed on the packaging.
  • Soap and water access. You will need liquid soap (preferably antibacterial, oil-free) and a clean, lint-free towel.
  • Optional but helpful: A small mirror to ensure lenses are placed in the correct compartment, and a pair of clean tweezers with silicone tips (if you are prone to dropping lenses).

Step 2: Wash and Dry Your Hands — the Right Way

Your hands are the primary vector for transferring bacteria, oils, and debris to your lenses. A quick rinse under water is not sufficient.

How to Wash

  1. Wet your hands with warm water.
  2. Apply a generous amount of soap and lather for at least 20 seconds. Pay attention to areas between fingers, under nails, and around the wrists.
  3. Rinse thoroughly under running water.
  4. Dry your hands completely with a clean, lint-free towel. Damp hands can transfer waterborne bacteria and also make lenses stick to your fingers.

Important: Avoid soaps that contain heavy moisturizers, oils, or fragrances. These can leave a residue on your hands that may transfer to the lenses and cause blurred vision or irritation.

Step 3: Remove and Clean Each Lens

Cleaning and storage are inseparable. Simply dropping lenses into solution without rubbing and rinsing defeats the purpose of proper storage because debris will remain on the lens surface and contaminate the solution.

Proper Cleaning Technique

  • Remove one lens from your eye and place it in the palm of your hand.
  • Apply several drops of fresh solution directly onto the lens.
  • Gently rub the lens for about 10–15 seconds using your index finger in a back-and-forth or circular motion. This step physically dislodges protein deposits, lipids, and microorganisms.
  • Rinse the lens thoroughly with fresh solution before placing it in the case. The rinse washes away dislodged debris.
  • Repeat the same process for the other lens.

Do not use water, saliva, or homemade saline solutions for any step. These are not sterile and can introduce potentially blinding pathogens such as Acanthamoeba, which is found in tap water. The U.S. Centers for Disease Control and Prevention (CDC) strongly warns against using water on contact lenses. Learn more from the CDC about contact lens safety.

Step 4: Prepare the Lens Case Correctly

Many people fill the case after placing the lenses inside, which can leave parts of the lens exposed to air or lead to incomplete disinfection. The correct order prevents this.

How to Fill the Case

  1. Make sure the case is clean and dry before each use. Ideally, after the previous use, you should have left the case open to air dry overnight. Do not rinse the case with water immediately before filling; use fresh solution if needed.
  2. Open both compartments of the case.
  3. Fill each compartment completely with fresh multipurpose solution. The solution must come to the brim so that the lens will be fully submerged. If you use a case with a basket, the solution should cover the lens even after the basket is closed.

Never reuse old solution. Once solution has been inside a case, it is no longer sterile and its disinfecting ability is compromised. Mixing old and new solution dilutes the preservatives and can allow bacteria to thrive.

Step 5: Place Lenses in the Case and Seal

Pay attention to which lens belongs in which compartment. While it may not matter for identical prescriptions, it is a good habit to always use the same compartment for the right and left lenses (many cases are labeled R and L). This prevents mix-ups if your prescriptions differ and avoids cross-contamination.

  • Pick up the clean, rinsed lens with your fingertips.
  • Gently place it into the filled compartment. Ensure the lens is loose in the solution, not folded over or sticking to the edge.
  • If the lens is folded, use fresh solution on your fingertip to unfold it inside the compartment, or remove and repeat the rinsing process.
  • Close the cap tightly. A loose cap can allow contaminants from the environment to enter.
  • Repeat for the other lens.

Step 6: Store Properly and Maintain a Clean Environment

Once sealed, the case should be stored in a location that minimizes contamination and preserves solution effectiveness.

  • Keep away from moisture and heat. Do not store the case in the bathroom. Humidity and steam from showers can introduce bacteria to the outside of the case, and the warmth may accelerate breakdown of preservatives in the solution.
  • Avoid direct sunlight. Ultraviolet light can degrade some solution ingredients.
  • Store in a cool, dry, and well-ventilated area. A bedroom drawer or a shelf away from the sink works well.
  • Never store lenses in water or homemade solutions, even temporarily. If you are out of solution, do not attempt to improvise. The American Academy of Ophthalmology states that using anything other than approved contact lens solution increases infection risk dramatically.

Step 7: Daily and Weekly Maintenance of Your Case

Your lens case is a potential breeding ground if not cleaned regularly. Even with fresh solution, residues can build up on the inner surfaces.

Daily Care

  • After you insert your lenses each morning, empty the case completely.
  • Rinse each compartment with fresh solution (not water). Swirl it around to dislodge any deposits.
  • Wipe the inside of the caps with a clean tissue or a lint-free cloth.
  • Leave the case open to air dry upside down on a clean tissue. This prevents moisture accumulation and reduces bacterial growth.

Weekly Deep Cleaning

  • Once a week, boil or thoroughly wash the case with hot soapy water, then rinse with hot water. Let it dry completely before next use.
  • Some cases can be washed in the top rack of a dishwasher, but check manufacturer instructions.
  • If the case shows any signs of discoloration, cracks, or stubborn deposits, discard it immediately and open a new one.

Common Mistakes to Avoid

Even experienced lens wearers make errors. Awareness is the first step to prevention.

  • Topping off solution: Adding fresh solution to a case that still contains old solution is a major risk factor for infection. Always empty, rinse, and dry the case before refilling.
  • Using clear care cases too long: The three-month replacement rule is not arbitrary; it is based on microbial build-up and mechanical wear that creates micro-scratches where bacteria hide.
  • Storing lenses in the same case when traveling without proper packing: Travel-size containers should be used only temporarily. The same hygiene rules apply.
  • Skipping the rub step: "No-rub" solutions still require a light rub to remove deposits. Studies show that rubbing significantly reduces microbial load compared to soaking alone.
  • Failing to replace solution when lenses are not worn: Even if you don't wear your lenses for a day, the solution must be replaced every 24–48 hours. The soaking time should not exceed the manufacturer's maximum recommendation (typically 7 days without replacement for extended storage).

Special Considerations for Different Lens Types

All contact lenses, whether daily, bi-weekly, monthly, or specialty lenses, require the same storage principles. However, there are nuances:

Daily Disposable Lenses

Daily disposables are designed for single use and should never be stored overnight. After removal, they should be discarded immediately. Do not attempt to reuse them the next day, even if you stored them in solution. The FDA has not approved daily disposables for reuse, and studies show that even one night of storage can allow bacteria to adhere to the lens material.

Gas Permeable (RGP) Lenses

Rigid gas permeable lenses require a soaking solution that is specific to their material, often a conditioning and disinfecting solution. The cleaning step is particularly important because deposits adhere more tightly to the rigid surface. Store them in the designated case with the lens fully submerged. Do not use multipurpose solutions meant for soft lenses unless the product explicitly states it is safe for RGP lenses.

Silicone Hydrogel Lenses

These high-oxygen lenses are popular, but they can accumulate lipid deposits from the tear film more readily than older materials. The rubbing and rinsing step is especially critical for silicone hydrogel lenses to prevent discomfort and reduce the risk of giant papillary conjunctivitis.

Traveling with Contact Lenses

Jet lag, dry cabin air, and unfamiliar environments make travel a high-risk period for lens care mistakes.

  • Always carry your full-sized bottle of solution in your carry-on bag. Checked luggage can be lost or delayed.
  • Do not transfer solution to smaller containers unless they are sterile and travel-sized versions from the same brand. Mixing solutions in unlabeled bottles can lead to dangerous chemical reactions or use of expired product.
  • If you are flying, expect drier eyes. Consider taking rewetting drops approved for use with your lens type.
  • Keep your case in a sealed plastic bag when not in use to protect it from dust and cross-contamination from other items.
  • If you are camping or without clean water, use hand sanitizer with at least 60% alcohol to clean your hands, but avoid touching your lenses with sanitizer residue alone. Wait until it fully evaporates. However, nothing replaces soap and water for removing visible dirt and oils.

Signs of Contamination or Infection

Even with perfect storage, infections can occur. Know the early warning signs so you can act quickly.

  • Redness or pain in the eye that persists after removing lenses.
  • Blurred vision that does not clear when you blink.
  • Excessive tearing or discharge from the eye.
  • Sensitivity to light (photophobia).
  • Feeling of something in the eye (foreign body sensation) that continues for more than a few hours after lens removal.
  • White or gray spots on the cornea.

If you experience any of these symptoms, remove your lenses immediately and do not discard them. Instead, place them in a sterile container and bring them to your eye doctor for possible culture testing. Seek professional care without delay. Early treatment can prevent serious complications such as corneal scarring or ulcers.

When to Replace Your Contact Lenses and Solution

Adherence to replacement schedules is part of the storage equation. A lens that is worn beyond its recommended replacement period is more likely to accumulate deposits that are impossible to completely remove during cleaning, which then contaminate your storage case.

  • Replace lenses as directed by your eye care professional (daily, bi-weekly, monthly, or quarterly). Do not stretch the wear time even if the lenses feel comfortable.
  • Replace the solution bottle according to the manufacturer's guidelines. Most multipurpose solutions are good for about 90 days after opening. Write the opening date on the bottle with a marker.
  • Discard any solution that has changed color, become cloudy, or developed an odor.

Final Summary of Best Practices

  • Always wash and dry your hands before touching lenses.
  • Rub and rinse each lens with fresh solution before storage.
  • Use only commercial, sterile contact lens solution that is recommended for your lens type.
  • Fill the case before placing lenses in it.
  • Keep the case clean, dry, and replace every three months.
  • Store the case away from bathrooms, sunlight, and moisture.
  • Never top off old solution; use a fresh fill each time.
  • Do not sleep in lenses unless you have been prescribed extended-wear lenses and have discussed it with your doctor.
  • See your eye care professional annually for an eye health exam.

Following these steps consistently will significantly reduce your risk of eye infections, help maintain clear vision, and extend the comfort of your lenses. For additional authoritative guidance, the U.S. Food and Drug Administration (FDA) provides a helpful checklist on contact lens care, available at FDA: Contact Lens Care.