How To Store Contact Lenses Without Solution Safely
Storing contact lenses without proper multi-purpose disinfecting solution introduces severe risks of microbial keratitis, Acanthamoeba infection, and permanent corneal damage. If you find yourself completely out of solution, absolute emergency protocols dictate using sterile saline or daily-wear disposal as temporary measures, while strictly avoiding tap water, saliva, or homemade concoctions under all circumstances.
Emergency Assessment & Temporary Storage Planning
Finding yourself without contact lens solution creates an immediate clinical hazard for your ocular surface. Hydrogel and silicone hydrogel lens matrices are highly porous biomaterials capable of absorbing microorganisms, chemical contaminants, and impurities found in non-sterile liquids. Before attempting any temporary storage method, you must evaluate whether you can simply discard the lenses and wear backup spectacles.
- Essential gear, tools, and materials: A clean contact lens case, fresh sterile saline solution (if available), single-use daily contact lenses (as replacements), and a container of hydrogen peroxide-based cleaning system (as an alternative).
- Mandatory prerequisite knowledge and standards: Understanding that tap water contains Acanthamoeba cysts—organisms that can cause sight-threatening corneal infections—and that saliva harbors over 500 species of oral bacteria.
- Estimated execution metrics: Emergency setup takes approximately 3 to 5 minutes, though lenses stored in non-ideal temporary liquids should be discarded within 2 to 4 hours to minimize microbial bioburden accumulation.
Emergency Step-by-Step Contact Lens Storage Protocol
Step 1: Hand Hygiene and Workspace Sterilization
Thoroughly scrub your hands for a minimum of 20 seconds using non-cosmetic, antibacterial liquid soap that does not contain heavy moisturizers, oils, or fragrances. Dry your hands thoroughly using a lint-free microfiber towel or clean paper towels to prevent microscopic paper fibers or lint from adhering to the wet contact lens surface. Sanitize the countertop or surface where you will place your lens case using an isopropyl alcohol wipe and allow it to air-dry completely.
Warning: Never use bath towels or hand towels that have been exposed to fabric softeners or lingering laundry residues, as these chemical agents transfer readily to lenses and cause severe chemical conjunctivitis.
Step 2: Selecting the Least Detrimental Temporary Liquid
Evaluate your immediate environment for acceptable emergency liquids, prioritizing them strictly by safety margins. Sterile 0.9 percent sodium chloride saline solution (unpreserved or preserved) is the only acceptable temporary wetting agent, though it lacks disinfecting agents and protein-removing surfactants. Never utilize bottled water, distilled water, well water, pool water, or bottled mineral water under any conditions, as these fluids are notorious vectors for waterborne parasites and destructive microbes.
Pro-Tip: If you only have sterile saline, remember that it provides zero disinfection. You must thoroughly clean, rub, and disinfect the lenses in fresh multi-purpose solution as soon as you acquire it before placing them back on your eyes.
Step 3: Preparing the Case and Submerging the Lenses
Clean your contact lens case thoroughly with fresh sterile saline or boiling water, then let it air upside down on a clean tissue until completely dry. Place each lens carefully into its respective right or left chamber using clean fingertips or a specialized silicone-tipped lens insertion tool. Fill the chamber completely with your chosen emergency liquid until the lens is fully submerged, ensuring no portion of the matrix extends above the liquid line to dry out.
Step 4: Sealing and Environmental Preservation
Tightly screw down the caps of the lens case to create an airtight seal that prevents evaporation and environmental contamination. Store the sealed case in a cool, dark environment away from direct sunlight, high heat sources, and bathroom humidity, which accelerates bacterial growth within non-disinfected fluids. Set a strict mental or digital timer for a maximum of 2 to 4 hours, acknowledging that extended storage in non-disinfected liquid drastically increases your risk of microbial contamination.
How To Store Contact Lens | Storables
Comparison of Emergency Storage Liquids and Safety Margins
| Liquid Type | Disinfection Capability | Ocular Safety Risk | Recommended Action |
|---|---|---|---|
| Sterile Saline Solution | None (Rinsing agent only) | Low (if pH-balanced) | Use for max 2 hours; disinfect immediately after. |
| Bottled Distilled Water | None | High (Acanthamoeba risk) | Avoid completely; discard lenses immediately if exposed. |
| Tap Water | None (High pathogen load) | Critical (Severe corneal ulceration) | Never use; throw lenses away instantly. |
| Human Saliva | None (High bacterial load) | Critical (Severe bacterial keratitis) | Never use; throw lenses away instantly. |
| Hydrogen Peroxide (3%) | High (Oxidative destruction) | Extreme (Chemical burn if unneutralized) | Use ONLY with specialized neutralizing case for 6+ hours. |
Common Storage Failures and Field Fixes
- Scenario: Lenses dried out completely on a counter or table surface because the case cap was left loose.
- Root Cause: Rapid dehydration causes hydrogel and silicone hydrogel polymers to become brittle and structurally compromised.
- Actional Fix: Do not attempt to force the dry, brittle lens open or pry it apart. Submerge the hardened lens in fresh multi-purpose solution for at least 30 minutes. If cracks, tears, or structural warping remain visible upon rehydration, discard the lens immediately to avoid corneal abrasions.
- Scenario: Accidental exposure of the contact lenses to tap water during rinsing or storage.
- Root Cause: Tap water introduces microscopic impurities, chlorine, and parasites directly into the porous lens matrix.
- Actional Fix: Remove the lenses from your eyes or case immediately. Discard the contaminated lenses into the trash, perform a thorough chemical disinfection of your lens case using boiling water or fresh solution, and insert a fresh pair of lenses or wear your backup glasses.
- Scenario: Storing lenses in saline overnight without an active disinfecting agent.
- Root Cause: Saline lacks biocides such as Polyaminopropyl Biguanide (PAPB) or Polyquaternium-1, allowing ambient bacteria to multiply unchecked.
- Actional Fix: Do not insert these lenses directly into your eyes. Place them in a fresh multi-purpose disinfection system for a full recommended soak cycle, or perform a hydrogen peroxide neutralization process before any attempted re-insertion.
Frequently Asked Questions
Can I store my contact lenses in water overnight if I have no other choice?
No, you must never store contact lenses in tap water, bottled water, or purified water. Water contains numerous microorganisms, most notably Acanthamoeba, which can attach to the lens, burrow into the cornea, and lead to blinding infections requiring corneal transplantation. If you have no solution, it is infinitely safer to discard the lenses and wear your eyeglasses.
Is it safe to use eye drops instead of contact lens solution?
Rewetting drops or lubricating drops are designed for temporary relief while lenses are on your eyes, not for soaking or disinfecting lenses in a case. They lack the necessary antimicrobial preservatives, cleaning surfactants, and osmolarity balance required to maintain lens integrity overnight. Using eye drops for storage will cause the lenses to absorb chemical additives and become contaminated with trapped bacteria.
What should I do if my eyes turn red after wearing lenses stored without solution?
Remove the contact lenses immediately and store them in a labeled container if you need to show them to an optometrist. A red, painful, or light-sensitive eye is a primary warning sign of microbial keratitis, corneal abrasion, or acute hypoxia. Schedule an emergency evaluation with an eye care professional immediately and do not wear contact lenses until cleared.
Can I boil my contact lens case and saline to make it safe?
Boiling water can effectively sterilize a contact lens case, but it will not render non-sterile water safe from chemical contaminants, nor can you safely boil a contact lens without melting or destroying its polymer matrix. Hydrogel and silicone hydrogel lenses cannot withstand thermal sterilization temperatures without sustaining irreversible physical deformation and structural damage.
Schedule an annual comprehensive eye examination with your optometrist to discuss proper lens care compliance and to acquire emergency travel-sized contact lens solution kits for your car, office, and travel bags.
