The answer is different for every lens type. Daily disposables go in the trash each night. Bi-weekly lenses last 14 days. Monthly lenses last 30 days from first open. Extended wear and rigid gas permeable lenses follow schedules set by your doctor. Keeping track of all that mentally is a real burden, and a missed replacement is an easy way to end up with an eye infection.
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Every lens type has a different replacement cadence. The table below gives you a quick reference. Your contact lens box and your eye doctor's instructions are the final word for your specific brand.
| Lens Type | Replace Every | Annual Exam |
|---|---|---|
| Daily disposable | Every day | Yes, annually |
| Bi-weekly | Every 14 days | Yes, annually |
| Monthly | Every 30 days | Yes, annually |
| Extended wear | Per doctor's schedule | Yes, annually |
| Rigid gas permeable | Every 1-2 years | Yes, annually |
The "Replace Every" column counts from the first day you open the lens pack, not from the days you actually wear them. A monthly lens opened on April 1 should be replaced by May 1, whether you wore it 20 days or 5.
It's easy to confuse these two schedules, but they work independently of each other. Lens replacement is about how long the physical lens is safe to wear before material degradation and deposit buildup become a problem. Prescription renewal is about how often your eye doctor needs to reassess your vision and confirm the right correction.
Most contact lens prescriptions expire after one year. That means even if your vision feels unchanged, you need an annual exam to legally reorder lenses. The exam also gives your doctor a chance to check corneal health, which can be silently affected by contact lens wear over time.
A useful way to think about it: your lens replacement schedule tells you when to open a new pack. Your prescription renewal date tells you when to call your eye doctor. Both need their own reminder.
If you notice your lenses feeling uncomfortable before the scheduled replacement date, read about signs you need new contact lenses to know when to swap early. And if you've ever pushed a lens past its expiry, check what wearing expired contact lenses can actually do to your eyes.
For a full overview of the replacement and renewal process, visit the contact lens renewal guide.
Unlike a medication with a pill count or a subscription with a bill, contact lens replacement has no built-in prompt. You open a new pack, start wearing, and then at some point you're supposed to remember how many days ago that was.
For bi-weekly wearers that's every 14 days. For monthly wearers it's every 30. If you wear contacts on some days but not others, the math gets even murkier, because the replacement date is still based on calendar days, not wear days.
The simplest fix is to set a recurring reminder the day you open each new pair. That offloads the tracking entirely. You don't need to remember a date, just act on a notification when it arrives.
Daily disposable lenses are designed for single use only. You put in a fresh pair each morning and throw them away at night. Wearing a daily lens for a second day introduces bacteria, protein deposits, and reduced oxygen flow — all of which raise infection risk.
Bi-weekly lenses accumulate protein, lipid, and calcium deposits over time. After 14 days, those deposits become hard to clean off and begin to irritate the eye. Wearing them for 30 days increases the risk of corneal inflammation and eye infections significantly.
No. Monthly contacts are rated for 30 days of wear from the first day you open the pack — not 30 days of actual use. Even if you only wore them a few times, the lens material degrades once it contacts tear film and air. Replace them at the 30-day mark regardless of how often you wore them.
Yes. Annual exams catch prescription changes before they cause headaches or eye strain, and they check for conditions like glaucoma or retinal changes that show no early symptoms. Your contact lens prescription also expires after one to two years in most states, so you need an exam to reorder lenses legally.
RGP lenses typically last one to two years with proper care. Unlike soft lenses, they are not disposable and can be cleaned and reused. Replace them when they show scratches, chips, or visible warping, or when your eye doctor notices fit or vision changes at your annual exam.
Extended wear schedules vary by brand and are set individually by your eye doctor based on your eye health and lens type. Most extended wear lenses are replaced weekly or monthly. Your doctor will confirm your specific schedule at each exam. Never self-extend an extended wear schedule without checking first.
Set a reminder for your next lens replacement and get an email when it's time. Free, no account needed.
Set My Lens Replacement ReminderLast modified: