Private planning tool
Contact lens pack expiration tracker
Unopened daily-disposable lenses do expire. Every sealed blister pack carries its own printed date, and a year of lenses bought in one order rarely carries just one. Enter what is printed on your foils and get a first expiring, first out rotation order plus a count of the packs you would not reach in time.
Your unopened packs
Add one row for each group of unopened packs that shares a printed expiration date. Count the sealed blister packs themselves, one lens per pack, and count each eye separately. Everything is calculated in your browser and nothing is uploaded.
Many foils print only a year and month, such as 2029-04. Enter the first day of that month so the plan stays on the safe side of the printed date.
Many foils print only a year and month, such as 2029-04. Enter the first day of that month so the plan stays on the safe side of the printed date.
Many foils print only a year and month, such as 2029-04. Enter the first day of that month so the plan stays on the safe side of the printed date.
The estimate spreads wear days evenly across each week. It does not know which weekdays you actually wear lenses, and it does not choose a wearing schedule for you.
A buffer is a personal planning preference, not a rule from any manufacturer or agency.
Your prescription and your packs carry two separate dates. Adding the prescription date shows which one you reach first.
Your rotation plan
Enter at least one batch with a pack count and the expiration date printed on its foil to see a use-first order and a count of lenses at risk.
Two dates, and only one of them is on your prescription
Most people who order a year at a time are tracking one date, the one on the prescription, because that is the date a retailer asks about. The packs sitting in the drawer carry a completely separate one. The two are set by different parties for different reasons, and there is no rule that keeps them in step.
| Date | Printed on | What it controls | When it passes |
|---|---|---|---|
| Prescription expiration | Your contact lens prescription, next to the issue date. | Whether a US seller may fill a new order. Under the FTC Contact Lens Rule the prescription expires on the date set by the law of the state where it was written when that date is one year or more after the issue date, and otherwise not less than one year after the issue date. | You cannot buy more lenses under it. Packs you already own are still packs you already own, but the reorder path is closed until you have a current prescription. |
| Pack expiration | The carton and the foil of each individual blister pack, usually as a year and month and sometimes as a full date. | How long the manufacturer supports the sealed unit. CooperVision's US package insert for clariti 1 day states that each lens is supplied sterile in a blister pack and that the blister is labeled with the base curve, diameter, dioptric power, manufacturing lot number, and expiration date of the lens. | The manufacturer no longer stands behind that specific sealed unit. Alcon's published medical information states that it does not recommend use of expired product because safety and efficacy have not been established. |
If you want the prescription side worked out properly, including the issue date, the state term, and the last sensible day to place an order under it, use the prescription expiration checker. This page is about the other date.
What the printed date on a blister pack covers
A daily-disposable lens is not simply a piece of plastic in a wrapper. It is a sterile device sealed in a solution, and the printed date describes the sealed unit as a whole. CooperVision's US package insert for clariti 1 day puts it directly under the heading How Supplied: each lens is supplied sterile in a blister pack containing isotonic saline solution, and the blister is labeled with the base curve, diameter, dioptric power, manufacturing lot number, and expiration date of the lens. The same insert adds the instruction that matters just as much as the date: do not use if the blister pack has been broken or damaged.
Manufacturers do not treat the date as a soft suggestion. Alcon's published patient medical information states that Alcon does not recommend use of expired product because safety and efficacy have not been established. That is the honest boundary of what anyone can tell you. It is not a claim that a pack fails the day after its date. It is a statement that nobody has established what happens after it, and that the manufacturer will not stand behind the answer.
Notice also what the date is not. It is not the date of manufacture, which appears separately in the symbols key with its own icon. It is not the lot code, which identifies the batch. And it is not a property of the lens material in isolation, because the seal, the solution, and the packaging are all part of what the date describes. That is why a damaged pack is out regardless of how much time is left on it.
Storage plays into this too. Alcon publishes room temperature for its products as the range the United States Pharmacopeia defines, 15 to 30 degrees Celsius or 59 to 86 degrees Fahrenheit, and describes storage within that range as what keeps a product stable through its shelf life. A box that spends a summer in a car is not covered by the same assumptions as a box on a shelf indoors, whatever the foil says.
How to read the foil
Foil printing is compact, and much of it is pictures rather than words. That is allowed on purpose. FDA's symbols rule permits a device manufacturer to use a symbol from an FDA-recognized standard in labeling without adjacent explanatory text, so a blister pack can legitimately carry an icon and a date and nothing else. Here is what the icons on a daily-disposable foil are telling you, using the symbols key published in the ACUVUE patient instruction guide.
| Symbol | Meaning | Why it matters for a rotation |
|---|---|---|
| Hourglass | Use by date, which is the expiration date. | The ACUVUE symbols key lists this symbol as the use by date. Under FDA's symbols rule a manufacturer may use a symbol from a recognized standard without adjacent explanatory text, which is why the foil often carries a picture and a date and nothing else. |
| Factory outline | Manufacturer. | Paired with a second symbol for date of manufacture. The date of manufacture is not the date you plan around. The use by date is. |
| LOT | Batch code. | Two packs of the same brand and power can carry different lot codes and different use by dates. This is the field that tells you they are not interchangeable for planning. |
| Broken package | Do not use if package is damaged and consult instructions for use. | A damaged sealed unit is out regardless of the date. Both the ACUVUE and CooperVision inserts carry this instruction in plain text as well as in symbol form. |
Dates are commonly printed as a year and a month, sometimes as a full year, month, and day. When a foil gives you only a month, this planner asks you to enter the first day of that month. That is a deliberately conservative reading. It costs you a few weeks of theoretical shelf life and it removes any chance that the plan quietly walks you past a date.
Why a bulk order creates a rotation problem
Almost everything about buying contact lenses pushes you toward buying a lot at once. Per-box pricing improves with quantity. Rebates are usually written against annual supplies. Vision benefits and flexible spending accounts run on plan years with hard deadlines, so a December order is often a December order for reasons that have nothing to do with when you run out. The result is that a large share of daily-disposable wearers are holding several hundred sealed packs at any given time.
A stockpile that size stops behaving like a supply and starts behaving like inventory, and inventory has failure modes that a single box does not. The two that actually bite are mixed lots and uneven eyes.
Mixed lots happen because a retailer ships from a warehouse. There is no rule that the box arriving today was made after the box that arrived in the spring, and a lot that has been sitting in stock for a while can land in your hands after a fresher one. If your filing method is to put the new box on top, you have just buried the pack you should be using next.
Uneven eyes happen because prescriptions differ per eye, because a torn pack gets discarded from one side, and because two boxes of different sizes get ordered together. A wear day needs one left pack and one right pack. Twelve left packs sitting next to forty right packs is a twelve day supply, and the twenty eight extra right packs are quietly aging while they wait for partners.
Both problems are invisible in a drawer and obvious in a sorted, per-eye rotation. That is all this tool does: it makes the sorted version visible before the dates make it visible for you.
Read every foil, not just the carton
A carton carries one date for the whole box, but the blister packs inside it carry the date and the lot code individually. When you split a 90 pack across a drawer, a travel bag, and a desk, the carton date stops travelling with the packs. Read the foil.
Group packs by printed date, not by where they came from
Two orders placed four months apart can arrive with lots that expire two years apart, and the second order can easily be the one that expires first. Sort by what is printed, not by the order date in your email.
Put the earliest printed date at the front
First expiring, first out is the whole method. It is the same logic a pharmacy uses on a shelf, and it is the one habit that turns a stockpile from a liability back into an asset.
Keep the left and right sets physically separate
Contact lenses are prescribed and packaged per eye. A left pack and a right pack together make one wear day, so an imbalance in one eye caps the usable supply no matter how many packs you own in total.
Recount on a fixed day
Pick one day a month. Count the sealed packs for each eye, check the earliest printed date you still hold, and compare that against the date you expect to reach it. A count you can do without opening anything takes under a minute.
Inspect before every use
The ACUVUE OASYS 1-Day patient instruction guide is explicit: do not use if the sterile blister package is opened or damaged. A lifted corner, a puncture, or a pack that no longer has solution moving inside it is a pack to set aside regardless of the printed date.
Six mistakes that turn a stockpile into waste
Treating the newest box as the freshest
Delivery order and manufacturing order are not the same thing. Retailers ship what is in the warehouse, and a lot that has been sitting there can arrive after a newer one. Compare printed dates when a box arrives, then file it in date order rather than on top.
Reading the carton date and never looking at the foil
The carton is a shipping unit. The blister is the device package, and the insert says the blister itself is labeled with the lot number and the expiration date. Once packs leave the carton, only the foil still knows.
Assuming a year and month means the whole month
A foil printed 2029-04 gives you a month and not a day. If you are close enough to the date for the difference to matter, you are close enough that you should be using that pack now instead of planning around it. This tool asks for a specific date so that the plan errs on the safe side.
Buying a two-year supply on a one-year prescription and stopping there
Buying ahead is often where the per-box price and the rebates are best. It does not extend the prescription, and it does not replace the recheck interval your prescriber recommends. A big order needs the exam booked, not deferred.
Letting a partial box for one eye hide behind a full box for the other
Wear days consume both eyes at once. Twelve left packs and forty right packs is a twelve day supply with twenty eight right packs waiting for a left partner that has to be ordered.
Using a lens organizer as a care product
A hard-shell organizer holds sealed, unopened daily-disposable blister packs. It is not a soaking case, it never holds a bare lens or a worn lens or solution, and it does not change the printed date on anything inside it. Removed reusable lenses need the case and solution your prescribed care system specifies.
Frequently asked questions
Do contact lenses expire if they are unopened?
Yes. Every sealed blister pack carries a printed expiration date, and manufacturers publish that date as a use by date for the sealed unit. CooperVision's US package insert for clariti 1 day states that the blister is labeled with the lens parameters, the manufacturing lot number, and the expiration date of the lens. Alcon's published medical information states that it does not recommend use of expired product because safety and efficacy have not been established. The date applies to the unopened pack as it was manufactured and sealed, so leaving a pack unopened does not pause it.
Where is the expiration date printed on contact lenses?
In two places. The carton carries a date for the box, and each individual blister pack carries its own date on the foil along with the base curve, diameter, power, and the lot code. Once packs are out of the carton, the foil is the only copy you still have, which is why this tool asks you to read the foil rather than the box.
What does the hourglass symbol on a contact lens pack mean?
It is the use by date, which is the expiration date. The ACUVUE patient instruction guide symbols key lists the hourglass as the use by date and separately lists a symbol for date of manufacture. FDA's symbols rule permits a manufacturer to use a symbol from an FDA-recognized standard in device labeling without adjacent explanatory text, so a foil often shows the symbol and a date with no words at all.
Can I use contact lenses one month past the printed date?
That is not a call this planner makes and it is not a call a website should make for you. The manufacturers state plainly that they do not support use of expired product, and your eye-care professional is the person who knows your eyes and your history. What this tool does is show you the packs that are heading toward that question so that you can use them first and avoid having to ask it.
How is this different from the prescription expiration checker?
They cover two separate dates. The prescription expiration checker works on the date on your prescription, which governs whether a seller may fill a new order. This tracker works on the dates printed on the packs you already own. A large advance order can outlive one date, the other, or both, and the two dates rarely land in the same month.
How does the tool decide which packs are at risk?
It sorts your batches by printed date, earliest first, and then walks a separate queue for each eye at the number of wear days per week you enter. For each batch it works out how many of its packs you reach before the printed date, using the finish-by buffer if you set one. Anything you would not reach in time is counted as at risk. Every calculation runs in your browser and nothing you type is uploaded.
Why does the tool ask for left and right counts separately?
Because lenses are packaged and prescribed by eye, and a wear day needs one of each. A box labeled 90 contains 90 individual lenses, not 45 pairs. Counting each eye separately is the only way to see an imbalance, and an imbalance is what actually sets the date your supply runs out.
What should I do with packs that will expire before I reach them?
Move them to the front of your rotation so that you use them first, which is usually enough to solve the problem entirely. If you are still holding more than you can use in time, ask your eye-care professional what they recommend for those packs, and adjust the size of your next order so the same thing does not repeat.
Does a hard-shell organizer change how long a pack lasts?
No. Nothing about a storage container changes a printed date. What an organizer changes is whether you can see what you have. Keeping sealed packs sorted, with the left and right sets separate and the foil readable, is what makes a first expiring, first out rotation possible without opening anything.
Should I store unopened packs anywhere in particular?
Follow the storage instructions in the labeling that came with your lenses. Alcon publishes room temperature for its products as the range the United States Pharmacopeia defines, 15 to 30 degrees Celsius or 59 to 86 degrees Fahrenheit, and notes that storage within that range is what supports the product through its shelf life. A hot car and a freezing garage are the two places a stockpile most often goes wrong.
Can I plan around a lot code instead of a date?
No. The lot code identifies the batch and is what a manufacturer needs if you ever report a problem, but it is not a date you can read. Use the printed expiration date for planning and keep the lot code with the pack in case you need it.
Sources
Every factual statement on this page traces to one of the following. Manufacturer labeling governs your specific lenses, so read the insert that came with your product and ask your eye-care professional about anything the labeling does not settle.
- CooperVision clariti 1 day US package insertHow supplied, blister labeling contents including lot number and expiration date, and the damaged-package instruction.
- ACUVUE patient instruction and product guidesSymbols key listing the use by date and batch code symbols, and the instruction not to use a sterile blister package that is opened or damaged.
- Alcon patient medical informationManufacturer position on expired product and the United States Pharmacopeia room temperature range used for storage.
- FDA, use of symbols in labelingWhen a device manufacturer may use a stand-alone symbol in labeling without adjacent explanatory text.
- 21 CFR 801.15The codified rule on prominence of required label statements and the use of symbols in medical device labeling.
- FDA, buying contact lensesContact lenses are medical devices that require a current, valid prescription.
- 16 CFR 315.6How the expiration date of a contact lens prescription is determined under the Contact Lens Rule.
- FTC Contact Lens Rule guide for prescribers and sellersPrescription release, seller verification, and what a seller may and may not fill.
- CDC, healthy contact lens wear and careGeneral wear and care recommendations, including following the replacement schedule your eye care provider recommends.