What Line Is 20/40 on an Eye Chart
20/40 is the fourth full line from the bottom on a standard eye chart, one line above the 20/20 row most people remember as normal.
What matters about 20/40 for your driving record
- It's usually still passing Most states set the minimum vision line for an unrestricted license at or below 20/40. Check your state's DMV requirement since the exact line varies.
- It may trigger a restriction Some states require corrective lenses once you measure at 20/40, even if you weren't wearing glasses before. Ask your eye doctor to confirm what your state does at this line.
- Each eye is measured separately You can have 20/40 in one eye and better or worse in the other. Bring both numbers to your renewal since some states look at your weaker eye, not just your better one.
- It's not legal blindness 20/40 is mild vision loss, far from the threshold states use for legal blindness. Don't let the number alone worry you without knowing your state's actual cutoff.
- It can change year to year Vision can shift gradually, especially with cataracts or other age-related changes. Get it checked before your renewal, not after, so you know where you stand.
Does 20/40 vision mean I'll need a license restriction?
It depends on your state, not on the number itself. Many states set their minimum vision standard right at 20/40, so you pass without any restriction. Others set the line a little higher or lower, and some automatically add a corrective lens restriction once you're measured at 20/40 or worse, even if you've never worn glasses before.
The only way to know for certain is to check your state's current DMV vision standard, since it is not the same everywhere and some states review it more often than others. Your eye doctor can also tell you, during your exam, exactly where your results fall against that line and whether a restriction is likely.
A restriction is not a loss of your license. It just means you drive wearing the glasses or contacts you were tested in, the same way millions of license holders already do.
Getting your eyes checked before your renewal
If you do
You'll know your exact numbers before the DMV does. If you're near the cutoff, you have time to get glasses or an updated prescription so you pass without surprise, and you walk into your renewal confident instead of guessing where you stand.
If you don't
You'll find out your result at the counter, with no time to fix anything. If you fall short, you may need a follow-up visit, a retest, or a temporary restriction added on the spot, which can delay your renewal longer than scheduling an exam ahead of time would have.
Once you know where your vision stands, compare quotes to see what a clean, confident renewal actually costs you.
What vision score do I need to pass a DMV eye test?
It depends entirely on your state, since each one sets its own minimum line, often somewhere near 20/40 but not always exactly there. Check your state DMV's published vision standard rather than assuming it matches another state or a general rule. Some states also test peripheral vision separately, which adds a second standard you'll want to know about before you go in.
Will needing glasses for driving raise my insurance rate?
No, a vision restriction on your license by itself does not raise your rate. Insurers price based on your driving record, claims history, and other factors, not on whether your license says you must wear corrective lenses. If a vision change leads to an actual accident or a new condition noted on your record, that could affect pricing, but the restriction alone does not.
How often should I get my eyes tested after 75?
Checking yearly is a reasonable habit once you're in your late 70s or older, since vision can shift gradually and a yearly check catches it before a renewal does. Some eye conditions common at this age progress faster than others, so ask your eye doctor what schedule fits your specific eyes rather than following a general rule.
Know your state's actual cutoff before your renewal, so the number on the chart never catches you off guard.
