Expired Contact Lenses: Are They Safe to Wear or a Risk to Your Eyes?
Wearing contact lenses is part of everyday life for many Australians. But what happens when you realise the lenses at the back of your drawer are past their expiry date? It might be tempting to wear them anyway, especially if you’re trying to save money or haven’t had time to reorder.
While extreme cases are rare, using expired contact lenses is far more common than it should be — and it can pose serious risks to your eye health.
So why do contact lenses expire, and what can actually happen if you wear them past their use-by date?
Why Do Contact Lenses Expire?
Contact lenses don’t expire because the lens itself suddenly becomes unusable. The issue is sterility.
During manufacturing, contact lenses are produced and sealed in sterile conditions. They’re stored in a saline solution inside airtight blister packs designed to keep bacteria and fungi out.
Over time, however, that protective seal can weaken.
How Contact Lens Packaging Works
In the past, contact lenses were packaged in glass vials, which were expensive, heavy, and easily broken. Today, plastic blister packs are used instead. They’re safe, efficient, and space-saving, but they don’t last forever.
Most blister packs are designed to maintain sterility for up to four years. After that, the seal can degrade due to age, temperature changes, or handling during storage and transport.
What Happens When Contact Lenses Expire?
Once the packaging seal is compromised, even slightly, oxygen and microorganisms can enter. This creates an environment where bacteria or fungi can begin to grow on the lens.
Your eyes are one of the most sensitive and absorbent parts of the body. Placing a contaminated lens directly onto your eye significantly increases the risk of infection.
Are Expired Contact Lenses Dangerous?
Yes — expired contact lenses can cause serious eye problems.
Certain bacteria, including Pseudomonas aeruginosa, can thrive on contaminated lenses. This type of infection can develop quickly and, if not treated promptly, may lead to corneal damage or permanent vision loss.
The Risk of Fungal Infections
Fungal infections are another concern with expired contact lenses. While saline solution keeps lenses moist, it doesn’t disinfect them.
If fungal spores enter through a weakened seal, they can multiply inside the packaging. When the lens is worn, the infection can transfer directly to the eye, where fungal keratitis can be difficult to treat and may require prolonged medication.
Why Expiry Dates Matter
Even when used correctly, contact lenses carry a small risk of eye infection. Wearing expired lenses increases that risk significantly.
Contact lenses sit directly on the surface of the eye, making cleanliness and sterility essential. If you’re ever unsure about a lens, it’s safer to discard it and switch to glasses until you can replace it.
Why People Wear Expired Contacts
Most people don’t intentionally put their eye health at risk. Common reasons include:
- Forgetting to reorder lenses
- Limited time to visit an optometrist
- Cost concerns
Fortunately, there are simple ways to avoid these situations.
Plan Ahead for Eye Care
Booking regular eye exams and setting reminders for lens reorders can help prevent running out unexpectedly. Many Australians find it helpful to reorder lenses online in advance so they always have a spare supply on hand.
How to Save Money on Contact Lenses in Australia
If cost is the main issue, you still have options:
- If your eyes are suitable, choose fortnightly or monthly lenses instead of daily disposables, as they are generally more cost-effective over time
- Compare prices within the same lens category to ensure you are getting the best value. The Quicklens Qieto range offers high-quality lenses at a more budget-friendly price
- Make the most of promotions and special offers by regularly checking the Quicklens Offers page. You can also subscribe to our newsletter or follow us on Instagram or Facebook to stay updated on the latest deals and upcoming promotions.
- Order from a trusted online retailer like Quicklens to get the same genuine lenses prescribed by your optometrist, often at significantly lower prices than in store
Keep up with regular eye exams to maintain eye health, but remember you are not required to purchase your lenses directly from the clinic
The Bottom Line
If your contact lenses are past their expiry date, the safest choice is to throw them away.
Wearing expired lenses isn’t worth the risk of infection or long-term damage to your vision. With convenient and affordable options available online in Australia, protecting your eye health has never been easier.
