Maintaining a fresh supply of contact lenses is a key part of your daily wellness and eye care routine. You might occasionally find an older box tucked away in a drawer and wonder if it’s still safe to use. The packaging seems sealed. So, they’re probably still okay to wear, right? Not necessarily.
Yes, contact lenses do expire, and wearing them past that date puts your eyes at risk. Before you pop in that old pair, take a look at the expiration date.
Why Contact Lenses Have an Expiration Date
It’s not the lens itself that expires first. The saline solution inside the sealed blister pack is the real issue.
Every contact lens sits in a small blister pack filled with saline solution. That solution keeps the lens moist, clean, and safe to wear. Over time, the seal on that pack can weaken, and the saline solution can start to break down and lose its effectiveness.
Once the solution degrades, it can no longer do its job. Your lens acts like a little sponge and absorbs that compromised liquid, which means it goes directly onto your eye. Most lenses are considered good for 1 to 4 years from the manufacture date, but once that window closes, the risk goes up fast. The type of contact lens you wear, whether daily, bi-weekly, or monthly, also affects how long the packaging stays stable.
Where to Find the Expiration Date on Your Contacts
Finding the expiration date should be easy. Check both the outer stylish box and the individual blister packs for a stamped date.
You’ll usually see it printed near the lot number, formatted as YYYY-MM or spelled out by month and year. Check the side or bottom panels if you’re looking at a full box.
Throw the pack away if the date has rubbed off or faded. Guessing simply isn’t worth the risk to your vision.
Risks of Wearing Expired Contact Lenses
A weakened or broken seal lets bacteria sneak into the pack. Unfortunately, you won’t be able to see or smell that contamination.
Placing a compromised lens on your eye introduces those germs directly to one of the most sensitive surfaces on your body. This may lead to uncomfortable eye infections that require an optometrist’s care to clear up.
Even if no infection develops, an expired lens can feel rough or scratchy against your eye. You might notice your vision looks hazy or blurry shortly after putting them in. Both of those are signs that something isn’t right, and the lens should come out immediately. In some cases, ongoing irritation from lens wear may also contribute to dry eye symptoms, and dry eyes can cause blurry vision that lingers even after you remove the lenses.
What to Do if You’ve Already Worn Expired Contacts
Realizing you’ve been wearing an old lens can be stressful, but it doesn’t have to be a problem. Acting quickly helps protect your eyes. Follow these easy steps if you suspect your contacts are past their prime:
- Remove and throw away the lenses right away. Don’t put them back in.
- Watch for redness, irritation, unusual discharge, or blurry vision over the next several hours.
- Reach out to an optometrist if any symptoms linger or get worse.
Noticing a problem early makes a big difference. Don’t wait to see if it clears up on its own if your eyes feel off. If you’re ever unsure whether a symptom needs urgent attention, emergency eye care is available for situations that can’t wait.
Tips to Stay on Top of Your Contact Lens Care
A quick check before you open a new pack takes about three seconds and can save you a lot of discomfort. Always look at the date before use. Stick to the replacement schedule your eye doctor recommends, whether that’s daily, bi-weekly, or monthly lenses. That schedule exists for a reason.
Wash your hands thoroughly before handling lenses every single time. Never rinse lenses with tap water or saliva. Both introduce bacteria that don’t belong anywhere near your eyes. Instead, use proper cleaning solutions to keep your routine safe and hygienic.
Refresh Your Lens Supply Today
Treat your vision like a premium experience and always have a fresh supply ready to go. Order your contact lenses directly through our clinic to avoid the stress of relying on old, expired boxes. Our online store makes it incredibly easy to stay stocked up on contacts so your eyes always feel their best. Plus, ordering through us gives you peace of mind knowing exactly when it is time for a replacement.
At Ham’s Superior Vision Centre, the team can help you stay on track with your contact lens wear and answer questions about your prescription. Schedule your appointment at our Oliver Road and Centennial Square Plaza locations in Thunder Bay.