Key Takeaways
- Glasses prescriptions are often valid for 1 to 2 years.
- Contact lens prescriptions usually last one year and include fit details.
- Children may need updates more often as their eyes grow.
- Retailers can decline an expired prescription.
- A renewal exam also checks the health of your eyes.
Why Your Prescription Has an End Date
You dig through the junk drawer looking for that slip of paper from your last eye exam at Murdoch and Macnab Doctors of Optometry, and there it is, folded behind an old receipt. The numbers look fine. The date at the top, however, is from 3 summers ago.
Glasses prescriptions in Canada usually stay valid for 1 to 2 years, while contact lens prescriptions typically last one year. After that, you need a fresh exam before you can order new lenses.
What a Prescription Expiry Date Really Means
That date isn’t a suggestion. It’s the window during which an optometrist can stand behind those numbers as an accurate description of what your eyes need.
Vision shifts over time. A small change in focusing power, a bit more astigmatism, or an early move toward reading glasses in your forties can all happen quietly between exams. The expiry date keeps your lenses matched to your current vision instead of the vision you had 2 birthdays ago.
Keep in mind that glasses, contact lenses, and eye medication each follow their own timelines. One rule doesn’t cover all three.
How Long Glasses & Contact Lens Prescriptions Last
Glasses Prescriptions
Adults usually get a glasses prescription that’s valid for 1 to 2 years. This gives you time to shop for frames, order a second pair for the car, or replace a scratched lens without booking another appointment.
Children are a different story. A child’s eyes change quickly during their school years, so a prescription written last September might already be behind by the following spring. Shorter timelines help keep the classroom whiteboard sharp.
Contact Lens Prescriptions
Contact lens prescriptions are generally good for 1 year. They have more information than a glasses prescription because a lens has to sit comfortably on your eye, not two centimetres in front of it.
Your copy of the prescription records the brand, the diameter, and the base curve, which is the gentle bowl shape matched to your cornea. Change any one of these factors, and your contacts may no longer do their job.
When Prescriptions Expire in Canada
Validity periods are guided by provincial regulations rather than one national rule, so the answer shifts a little depending on where you live.
In Saskatchewan, eyewear prescriptions are commonly written for 1 to 2 years for adults, with contact lens prescriptions on the shorter end because of the fit details involved. Children often fall on a tighter schedule.
Prescriptions for eye medication, such as drops for dry eye or an infection, usually carry a validity period of 1 to 2 years, though many are written for a much shorter course of treatment. The label on the bottle tells you what applies to yours.
Why an Expired Prescription Can Create Problems
Ordering lenses from an outdated prescription often means paying for vision that you’ve outgrown. If that prescription did get filled, you might still end up with blurry vision, or your contacts might end up causing you discomfort.
However, the bigger problem is what happens when you miss regular appointments. Conditions like glaucoma and diabetes can often be identified during an eye exam before you notice symptoms, which gives you more options for managing them.
How to Renew Your Prescription With an Optometrist in Saskatoon
Renewal is straightforward, and it usually takes one visit.
- Check the date on your current copy, along with any note about how long it stays valid.
- Book an eye exam with the team at a time that works for your schedule, including appointments for the kids on the same day.
- Ask for an updated written prescription before you leave so you have it on hand for frames or lens orders.
What to Bring to Your Visit
Bring your current glasses and, if you wear contact lenses, the boxes or foil packs. Those labels save time and help confirm what’s been working for you.
Jot down anything you’ve noticed since your last exam. This might include trouble with road signs, a new need to hold your phone farther away, dryness that shows up during long stretches at a screen, or eyes that feel tired sooner than they used to. Small observations often point your eye doctor toward the right adjustment.
Time for a Fresh Copy
If the date on your prescription has passed, or you can’t remember when your last exam was, that’s a good reason to get back in the chair. Our team at Murdoch and Macnab Doctors of Optometry can measure your vision, check the health of your eyes, and send you home with an updated written prescription that you can use for frames or contact lenses.
Book your next eye exam in Saskatoon and bring the whole family along on the same afternoon.
