Contact solution is a sterile liquid used to clean, disinfect, rinse, and store soft contact lenses, removing protein buildup and microorganisms that can cause eye infections.
If you wear reusable contact lenses, you need contact solution every day. It’s not just a rinsing liquid — it’s a disinfectant that keeps your lenses safe for repeated use. Many new wearers confuse it with saline or assume water works as a substitute. Neither is correct, and the difference matters for your eye health. Here’s what contact solution actually does, which type you need, and the common mistakes to avoid.
What Does Contact Solution Do?
Contact solution performs three essential jobs. It cleans lenses by loosening debris and protein deposits. It disinfects by killing microorganisms that collect on lens surfaces during wear. And it stores lenses in a sterile environment between uses, keeping them hydrated and ready for the next day. Multi-purpose solution handles all three jobs in one bottle, which is why it’s the most common choice for soft lens wearers.
Contact Solution vs. Saline: Not the Same Thing
A frequent point of confusion is the difference between contact solution and saline solution. Sterile saline is only for rinsing — it has no cleaning or disinfecting power. Using saline alone to store lenses leaves them vulnerable to bacterial contamination. Contact solution, particularly multi-purpose solution, contains disinfecting agents and wetting agents that saline lacks. The FDA and CDC both emphasize that saline should never replace proper contact solution for cleaning and disinfection.
Water of any kind — tap, bottled, distilled, or lake water — is even worse. Water can introduce microorganisms that cause severe corneal infections. The rule is absolute: only sterile contact solution goes on your lenses.
Main Types of Contact Solution
| Solution Type | What It Does | Best For |
|---|---|---|
| Multi-purpose solution | Cleans, disinfects, rinses, and stores — all-in-one | Most soft contact lens wearers |
| Hydrogen peroxide system | Deep disinfects but requires 6+ hour neutralization before wear | People with sensitivity to preservatives in multi-purpose solutions |
| Saline solution | Rinses only — no cleaning or disinfecting | Rinsing before insertion or use with a separate cleaner |
| Hard lens solutions | Separate wetting, cleaning, and disinfecting products | Gas-permeable or hard contact lens wearers |
Hard contact lenses typically require separate products for wetting, cleaning, and disinfecting — there is no single “all-in-one” solution for them the way multi-purpose solution works for soft lenses. If you switch lens types, you must switch solutions accordingly.
How to Use Contact Solution Correctly
The proper routine is straightforward but must be followed exactly. Always wash your hands before touching lenses. Rub each lens gently with fresh solution, rinse, then place it in a clean case filled with fresh solution. Never “top off” — pouring new solution over old solution in the case reduces disinfectant strength and lets bacteria multiply. Discard leftover solution after each use and clean your lens case after every wear, letting it air-dry upside down. Cases should be replaced every three months.
If you’re new to contact lens care, choosing the right product matters. Our tested guide to the best contact solutions can help you find a reliable option that fits your sensitivity and routine. For most soft lens wearers, a quality multi-purpose solution is all you need.
Safety Rules and When to Get Help
Even with proper care, problems can arise. If your eyes become red, irritated, or your vision changes, remove the lenses immediately and consult an eye care professional. Don’t ignore discomfort — it can signal infection or a solution incompatibility. Some people react to certain preservatives or wetting agents, so the product your eye doctor recommends may differ from what a friend uses. Stick with what was prescribed for your eyes.
Finally, never transfer contact solution into smaller bottles. This can compromise sterility and introduce bacteria. Keep it in its original container with the cap tight when not in use. Expired solution should be thrown away — its disinfecting power is no longer guaranteed.
FAQs
Can I use contact solution for dry eyes?
No. Contact solution is not formulated as an eye drop. Using it as a rewetting drop can irritate your eyes. Instead, use rewetting drops specifically labeled for use with contact lenses during wear.
Does contact solution expire?
Yes. Check the expiration date on the bottle. Most bottles also recommend discarding the solution 30 to 90 days after opening, even if the expiration date hasn’t passed.
Why does my contact solution burn when I insert lenses?
A burning sensation can indicate a reaction to the solution’s preservatives, a damaged lens, or an eye infection. Remove the lenses, rinse them with fresh solution, and try again. If burning persists, stop using that product and consult your eye care provider.
References & Sources
- CDC. “About Cleaning, Disinfecting, and Storing Contact Lenses.” Covers proper handling, case care, and water-use warnings.
- FDA. “Contact Lens Solutions and Products.” Guidance on solution types, safety, and approved use.