What happens during a vision test at the DMV

When you renew your driver's license, the DMV will test your eyesight before they issue your new license. You'll look into a machine called a vision screener — it looks like a large microscope — and read letters or symbols that appear on a screen inside. The test takes about one minute. The examiner will test each eye separately, then both together, to check how clearly you see at distance and whether you have any blind spots.

The vision screener measures what's called your visual acuity. Most states require you to see at least 20/40 in each eye, with or without corrective lenses like glasses or contacts. If you wear glasses or contacts for driving, bring them with you — the test will be done with them on. The examiner will note on your record whether you passed with or without correction, and your license will carry a restriction if needed.

If you fail the vision test, you won't be turned away when ready. The DMV will tell you what the next step is, which usually means getting an eye exam from an optometrist or ophthalmologist and bringing documentation of your corrected vision back to the DMV before your license is issued.

Key Takeaways

  • Bring your glasses or contacts if you wear them for driving, because the test measures your vision with correction in place.
  • The vision screener tests each eye separately and takes about one minute total.
  • Most states require 20/40 vision or better in each eye to pass and renew your license.
  • If you fail, you'll need an eye exam from an optometrist or ophthalmologist before the DMV will issue your new license.
  • Your license will show a restriction if you're required to wear glasses or contacts while driving.

Bringing the right correction to your test

If you wear glasses or contacts, wear them to your DMV appointment. The vision test is designed to measure how well you see with your normal correction — the same way you see when you're actually driving. If you wear bifocals or progressive lenses, let the examiner know before the test starts so they can position the screener correctly.

If your glasses or contacts prescription has changed recently, consider getting an updated eye exam before your DMV appointment. An outdated prescription might cause you to fail a test you would otherwise pass. You don't need to bring your prescription paperwork unless the DMV specifically asks for it, but having current correction makes the test go faster.

What the 20/40 standard means

The number 20/40 refers to how clearly you see compared to a standard. If your vision is 20/40, it means you can see at 20 feet what a person with standard vision can see at 40 feet — in other words, you see half as clearly as the standard. Most states set the minimum at 20/40 because research shows that's the threshold where driving safety becomes a real concern.

Some states allow 20/50 or 20/60 vision if you're renewing a non-commercial license, but this varies by state. A few states have stricter standards and require 20/30 or better. The DMV examiner will tell you whether you passed or failed based on your state's specific requirement — you don't need to calculate it yourself.

If you fail the vision test

Failing the vision test doesn't mean you can't renew your license. It means you need to get an eye exam from an optometrist or ophthalmologist and bring the results back to the DMV. The eye doctor will test your vision and provide you with a report or form showing your corrected vision. Some states have a specific form the eye doctor must fill out; the DMV will tell you which one.

Once you have the eye doctor's report, take it back to the DMV along with your renewal paperwork. The DMV will review the report and issue your license if the eye doctor confirms you meet the state's vision standard with correction. This process usually takes a few days to a week, depending on how quickly you can schedule the eye exam and return to the DMV.

If you wear glasses or contacts and failed because you forgot to bring them, you can usually ask to retake the test on the spot if you have them with you. Ask the examiner before you leave — some offices allow this, though policies vary.

Color blindness and the vision test

The DMV vision test does not routinely check for color blindness. However, some states do screen for it, and a few require you to pass a color vision test to renew a commercial driver's license. If you know you have color blindness, mention it to the examiner when you arrive. They'll let you know whether your state tests for it and what happens next.

Color blindness rarely prevents you from renewing a regular driver's license. If it does affect your renewal, the DMV will inform you of the specific requirement and what documentation you need from an eye doctor.

Preparing for your vision test appointment

Arrive at the DMV with your current glasses or contacts if you wear them. Bring your renewal paperwork — usually your current license and proof of residency — along with any other documents the DMV listed in your renewal notice. If you've had an eye exam recently and have the results with you, bring those too, though they're not required unless you failed a previous test.

The vision test is one of several steps in the renewal process. Depending on your state, you may also have your photo taken, answer questions about medical conditions, and pay the renewal fee. The vision test itself is quick, but plan for your whole appointment to take 15 to 30 minutes.

Frequently Asked Questions

Do I need to bring my eye doctor's prescription to the DMV?

No, you don't need your prescription unless you failed a vision test and the DMV asked you to get an eye exam. If you wear glasses or contacts, just bring them with you to the appointment so you can take the test with your normal correction in place.

What if I wear progressive lenses or bifocals?

Tell the examiner before the test starts. They'll position the vision screener so you're looking through the part of your lens you normally use for distance driving. Progressive lenses can sometimes cause issues if the screener isn't positioned correctly, so speaking up helps the test go smoothly.

Can I retake the vision test if I fail?

You can't retake it at the DMV that day, but you can get an eye exam from an optometrist or ophthalmologist and bring the results back. Once the eye doctor confirms you meet the vision standard with correction, the DMV will issue your license. Some states allow you to retake the DMV test after a certain period if you prefer.

Will my license show that I need to wear glasses?

Yes. If you passed the vision test only with glasses or contacts, your license will carry a restriction code stating you must wear correction while driving. This is a legal requirement in all states — you must follow it or you can be cited for driving without required correction.

What vision standard do I need to meet?

Most states require 20/40 vision or better in each eye, with or without correction. Some states allow 20/50 or 20/60 for non-commercial licenses. Your state's specific requirement will be listed in your renewal notice or on the DMV website. The examiner will tell you whether you passed based on your state's standard.