How Often Should You Update Your Glasses Prescription?
How often to update your glasses prescription: typical eye test intervals, signs your vision may have changed, and how to order new lenses online.
5 min di letturaDi IGIOO Optical
In questa storia
- 01The usual rhythm, by age and situation
- 02Signs it may be time for a new test
- 03Why prescriptions change over time
- 04What to bring and ask at your appointment
- 05New prescription or just a new frame?
- 06How to use your new prescription online
- 07What if your prescription is a few years old?
- 08Making your current pair last between tests
- 09Frequently asked questions
- 10Ready for your next pair?
For most adults, an eye test every one to two years is a sensible rhythm, and sooner if your vision feels different. Your glasses do not "expire", but your eyes can change, so the prescription they were made for can slowly stop matching what you need.
The usual rhythm, by age and situation
There is no single number that fits everyone. These are common starting points; your optician or eye doctor will tell you what suits you.
| Situation | Typical check interval |
|---|---|
| Children and teenagers | Every 6 to 12 months |
| Adults 18 to 40, stable prescription | Every 1 to 2 years |
| Adults 40 and over (reading changes start) | Every 1 to 2 years |
| Progressive or bifocal wearers | About once a year |
| Anyone told to return sooner | Follow that advice |
Signs it may be time for a new test
- You squint or hold your phone further away (or closer) than before.
- Headaches or tired eyes after reading or screen work, which used to feel easy.
- Night driving feels harder, with more glare around lights.
- You push your glasses up or tilt your head to find the sharp spot.
- Your current pair simply feels "off", even though it is clean and sits well.
Any sudden change, such as new flashes, a dark patch or a sharp drop in clarity, deserves a prompt visit to an eye care professional rather than waiting for your usual appointment.
Why prescriptions change over time
Eyes are not static. Growing children and teenagers often need stronger lenses as they develop. In adulthood, many people notice that close work gets harder somewhere around the early to mid forties, which is why reading power or an ADD value appears on so many prescriptions. Long hours of near work, a new job with more screen time, or simply a few years passing can all shift how comfortable your current lenses feel.
Because these changes are usually gradual, you adapt without noticing. That is the main reason a regular test is useful: it compares how you see today with the numbers on your old paper, not with how you remember seeing last year.
What to bring and ask at your appointment
- Your current glasses and any spare pairs, so the optician can check them.
- A note of when and where you struggle: reading, screens, driving, sport.
- A request for your pupillary distance (PD) to be written on the paper; it saves a step later.
- A question about which lens type suits your day, such as single vision, reading or progressive.
Ask for a copy of the result in writing. You will type those numbers into the lens selector, and a clear paper copy keeps mistakes out.
New prescription or just a new frame?
Two different things can make glasses feel wrong. A worn-out frame (loose temples, bent bridge, scratched lenses) is a fit and wear problem that a new frame fixes. A changed prescription is a vision problem that only a test can confirm. If you are unsure, a quick check at your optician settles it before you order anything.
How to use your new prescription online
Once you have the paper from your test, the numbers go straight into the lens selector. If the abbreviations look unfamiliar, our guide on how to read a prescription explains SPH, CYL, AXIS and ADD. You will also need your pupillary distance; if it is not on your paper, follow the PD measuring guide.
Moving to a new type of lens? Reading help, for example, can be built into a pair of progressive lenses, or you can keep a separate set of reading glasses for close work.
What if your prescription is a few years old?
An older prescription is not unusable, but it is a snapshot of how you saw at the time. If your vision still feels sharp and comfortable, you may be fine for now. If you have noticed any of the signs above, book a test first, because ordering new lenses from outdated numbers can leave you with a pair that feels no better than the old one. When in doubt, a fresh test is the quickest way to be sure.
Making your current pair last between tests
- Keep the date of your last test somewhere easy to find, such as a phone reminder.
- Store your glasses in a case so lenses stay free of scratches.
- Keep your old pair as a spare once you update; it is handy if you lose or break the new one.
- Note any changes in how you see, so you can describe them at your next appointment.
Shop this guide
Frequently asked questions
Do glasses prescriptions run out?
Many prescriptions carry a date, and some shops ask for a recent one. Check the date on yours, and ask your optician how long it is valid where you live.
Can I keep wearing old glasses if I see fine?
If you see clearly and comfortably, there is usually no need to rush. Still, a regular check helps you notice small changes early.
Will a new prescription feel strange at first?
A short adjustment period is common, especially with a stronger change or a switch to progressive lenses. If things still feel wrong after a couple of weeks, speak to your optician.
Do I need a test if I only want a new style?
No. If your vision has not changed, you can reuse your current prescription in any frame. Our 14-day fit and style guarantee covers choosing a different look.
Ready for your next pair?
Browse all eyeglasses or start from our prescription glasses collection. Add your prescription in a few clicks with our lens selector.
