Yes, contact lenses expire. The EXP date on an unopened package, the replacement deadline after opening and the expiration of your prescription are different. Passing one check does not cancel another: an unexpired unopened lens can still be wrong for your current prescription.
Unopened lenses: read the package EXP date
Look for the expiration or use-by date on the box and individual blister. CooperVision’s wearer guide identifies both locations and advises against wearing expired lenses. Do not use a damaged or unsealed pack; follow the product’s packaging instructions.
Scroll the table to read every column.
| Label | Meaning | Common confusion |
|---|---|---|
| EXP / use-by date | The manufacturer’s expiration date | It does not give an opened lens extra wear time |
| MFG / manufacture date, when provided | When the product was manufactured | It is not the use-by date |
| LOT / batch code | Identifier for the manufacturing batch | It is not a manufacturing date you can decode yourself |
The ACUVUE product instructions distinguish manufacture, use-by and batch-code symbols. A label may show a symbol rather than the letters MFG or EXP. If the date format is unclear, confirm it with the manufacturer instead of inferring shelf life from LOT.
Opened lenses: calendar replacement
Daily disposable lenses are used once and discarded after removal. Reusable lenses follow their prescribed replacement interval after opening, not a tally of how many days you actually wore them. A monthly lens is not a bank of 30 individual wear days spread over several months.
Alcon’s lens-care guide distinguishes daily single-use and monthly replacement products. Follow your exact lens’s instructions and prescribed schedule, including any shorter replacement direction. Cleaning, disinfection and occasional wear do not extend its opened life.
Wear time within a day is another question. There is no universal 12-to-16-hour allowance for all lenses and all eyes, and “monthly” does not itself mean approved for sleeping in lenses. Follow the prescribed wearing schedule.
Prescription expiry is a separate date
In the United States, the FTC Contact Lens Rule sets a minimum prescription duration of one year unless a shorter period has a documented medical justification. A longer minimum required by state law applies in that state; a prescriber can also set a longer appropriate duration.
That is a U.S. prescription rule, not a global rule or a shelf-life extension. An expired prescription calls for the appropriate renewal, even when unopened boxes still have a future EXP date. Likewise, renewing your prescription does not make an expired or overdue lens usable.
Solution bottles and stored lenses have their own limits
A solution bottle has a printed expiration date and a product-specific discard period after opening. Lenses left in a closed case have a separate storage allowance. Check all of these rather than applying the bottle’s date to the lenses.
Our solution replacement guide explains fresh case solution, product-specific unopened-case storage and opened-bottle discard periods. If a lens is overdue, damaged or causing discomfort, do not use disinfection to justify continuing to wear it.
