Most adults should get new glasses every one to two years, though the real answer depends on your age, how fast your vision changes, and the physical condition of your current pair. A prescription that was perfect 18 months ago can quietly drift out of accuracy, leaving you with headaches or eye fatigue you might chalk up to stress or screen time.
The General Timeline for Adults
The standard recommendation is to update your eyeglass prescription every one to two years. That lines up with the American Optometric Association’s guidance for comprehensive eye exams: every two years for adults 18 to 60, and annually once you pass 61. These exams don’t just check whether your prescription has shifted. They screen for conditions like glaucoma and macular degeneration that develop without obvious symptoms.
Even if your vision feels fine, subtle changes accumulate. Your brain is remarkably good at compensating for a slightly off prescription, which means you can spend months squinting a little more or leaning closer to your screen without consciously noticing. A routine exam catches those shifts before they start causing problems.
Children and Teens Need Checks More Often
Kids’ eyes change faster than adults’, and an outdated prescription can affect school performance and development. The American Optometric Association recommends annual eye exams for children aged 6 through 17. Before that, children should have at least one exam between ages 3 and 5, and an initial screening between 6 and 12 months of age.
The American Academy of Pediatrics recommends vision screening every year from ages 3 to 6, then every other year until age 12, and again at 15. Children who already wear glasses typically need annual prescription updates because their eyes are still growing and refractive errors can shift significantly in a single school year. Watch for signs like forced blinking, rubbing their eyes frequently, or holding books unusually close to their face.
Why Seniors Often Need Annual Updates
After age 60, the lens inside your eye continues to stiffen and change shape, and conditions like cataracts, diabetic eye disease, and age-related macular degeneration become more common. That’s why annual professional eye exams are recommended for anyone 61 and older. Elderly adults who are at risk for falls should be screened even more frequently, potentially at every primary care visit, because outdated glasses are a significant and preventable fall risk.
If you take medications that can affect vision (certain blood pressure drugs, corticosteroids, or medications for autoimmune conditions), your doctor may want to check your eyes on a separate schedule as well, even in years between full optometric exams.
Signs Your Current Glasses Are Outdated
You don’t always need to wait for your next scheduled exam. Several symptoms suggest your prescription has changed or your lenses have degraded:
- Frequent headaches. When your eyes strain to compensate for lenses that are too strong or too weak, the muscles around them tighten. This often shows up as tension headaches around the temples or forehead.
- Squinting, especially while driving at night. Difficulty reading street signs or increased sensitivity to glare from headlights is a common early signal.
- Eye fatigue, dryness, or redness. If your eyes feel scratchy, watery, or tired by the end of the day, the prescription may no longer be accurate.
- Holding screens or books closer. Unconsciously shortening your reading distance means your lenses aren’t providing enough magnification.
- Physical discomfort from the frames. Persistent pressure on your nose or behind your ears can mean the fit has changed, sometimes because a new prescription requires a different lens thickness or weight.
Any of these on their own warrants an eye exam rather than waiting for your next scheduled appointment.
Your Lenses Wear Out Even If Your Eyes Don’t Change
Prescriptions aside, the physical lenses in your glasses have a shelf life. Anti-reflective coatings, scratch-resistant layers, and other treatments are generally designed to last the life of a prescription, which averages about 28 to 30 months. After that, coatings can start to peel, craze, or develop a hazy film that scatters light and reduces clarity. If a coating degrades within the first year, it’s worth bringing the glasses back to the retailer, as that usually indicates a manufacturing defect.
Even without coating issues, accumulated micro-scratches on polycarbonate or high-index lenses gradually reduce optical clarity. You may not notice the change day to day, but putting on a fresh pair often reveals just how much detail you’d been missing.
Screen Time and Digital Eye Strain
Heavy computer or phone use doesn’t permanently damage your eyes, but it can make an outdated prescription feel much worse. Digital eye strain produces symptoms like burning, blurred vision at near or far distances after screen use, difficulty refocusing when you look away, and neck or shoulder pain from unconsciously leaning forward.
Before assuming you need new glasses, try some ergonomic adjustments. Keep your screen about 20 inches from your eyes and position the top of the monitor slightly below eye level. Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. Adjust your screen brightness to match the ambient light in the room, and use a font size of at least 12 in a dark color on a light background. Limiting recreational screen time to four hours or less per day also helps. If symptoms persist after those changes, that’s the signal to schedule an exam, because your prescription may need a computer-distance correction or a different lens design.
How Insurance Affects Timing
Many vision insurance plans renew their frame and lens allowance every 12 months, with a typical benefit of around $150 toward frames. Some plans operate on a 24-month cycle instead. It’s worth checking your specific plan, because the renewal date and your exam schedule don’t always line up. If your plan renews annually, you can use that benefit for updated lenses even in a year when your prescription hasn’t changed, replacing worn coatings or damaged frames at a lower out-of-pocket cost.
If you don’t have vision insurance, the cost of an exam plus new lenses every two years is still a reasonable investment. Driving, working, and reading with an accurate prescription reduces eye fatigue, headaches, and the kind of subtle strain that compounds over long days. For most adults, the sweet spot is a comprehensive eye exam every one to two years, with new lenses whenever the prescription changes or the old pair shows visible wear.