The vision test measures whether you can see well enough to drive safely

The vision test for a permit is a quick screening that checks how clearly you see at a distance and sometimes up close. The examiner will use a machine called a vision screener or an eye chart, and you'll read letters or numbers from a set distance—usually 20 feet away. If you can read what a person with normal vision can read from that distance, you pass. Most states require you to see at least 20/40 vision in each eye, though some require 20/30. Glasses or contacts count; you don't have to see perfectly without them.

The test takes about two minutes. You'll stand in front of the chart or machine, cover one eye at a time, and read aloud what you see. The examiner records whether you pass or fail and notes whether you wore correction (glasses or contacts) during the test. If you wear them while taking the test, your permit will carry a restriction saying you must wear them while driving.

Key Takeaways

  • Most states require 20/40 vision or better in each eye to pass; some require 20/30.
  • The test uses an eye chart or vision screener and takes about two minutes at the DMV.
  • If you wear glasses or contacts during the test, your permit will require you to wear them while driving.
  • Failing the vision test means you cannot get a permit until you retest and pass, usually after seeing an eye doctor.

What happens if you fail the vision test

If you don't meet your state's vision standard, the DMV will not issue your permit. You'll be told the result on the spot. Most states let you retake the vision test the same day or within a few days at no extra fee, but you have to pass before you can move forward with the permit process.

If you fail twice, many states require you to see an eye care professional—an optometrist or ophthalmologist—and bring a signed form or letter confirming your vision meets the standard. Some states call this a vision correction certificate or medical report. You'll then retake the DMV test with that documentation. The eye doctor's visit is your cost, not the DMV's.

Vision requirements vary slightly by state

Most states use 20/40 as the minimum standard, meaning you can see at 20 feet what a person with normal vision sees at 40 feet. A few states are stricter and require 20/30. Some states also test your peripheral vision—how wide your field of view is side to side—because drivers need to see hazards coming from the sides. A few states screen for color blindness, though it rarely disqualifies someone unless the condition is severe.

Your state's DMV website lists the exact standard for your state. If you know you have vision problems, check before you go in so you're not surprised. Bringing your current glasses or contacts is always a good idea, even if you don't usually wear them, because you can ask to retake the test with them if you fail without them.

Corrective lenses and permit restrictions

If you wear glasses or contacts and pass the test while wearing them, your permit will print a restriction code—usually something like "corrective lenses required" or "must wear glasses/contacts." This means you are legally required to wear them every time you drive. A police officer can cite you for a violation if you're stopped and not wearing them, even if you can technically see without them.

If you pass the test without correction, no restriction appears on your permit. You're free to wear glasses or contacts if you want to, but you're not required to. Some people pass without correction but choose to wear glasses anyway for comfort or safety—that's fine and doesn't violate the permit.

How to prepare for the vision test

If you wear glasses or contacts, bring them with you to the DMV. Wear them during the test if you normally wear them while driving. If you don't usually wear them but think you might need them, ask the examiner if you can try the test with them on; if you pass with them, you'll pass the test, though the restriction will appear on your permit.

If you haven't had an eye exam in a while and you're worried about your vision, schedule one with an optometrist or ophthalmologist before your permit appointment. An eye doctor can tell you whether you'll pass the DMV standard and can provide the documentation you'll need if you fail the DMV test twice. This costs money, but it saves you from failing at the DMV and having to come back.

What the vision test does not check

The DMV vision test checks only how clearly you see at a distance. It does not test your ability to see up close, your night vision, your reaction time, or your ability to judge distance and speed. Those skills matter for driving, but the DMV assumes you'll develop them during the permit period and the road test. The vision test is a basic safety floor: if you can't see clearly enough to read a street sign from a moving car, you shouldn't be driving.

This means passing the vision test is necessary but not enough on its own. You still need to develop safe driving habits, learn to react quickly to hazards, and practice under different lighting and weather conditions. The permit period and supervised driving time are when you build those additional skills.

Frequently Asked Questions

Can I wear my glasses during the vision test?

Yes. If you wear glasses or contacts, wear them during the test. The examiner will note that you wore correction, and your permit will require you to wear them while driving. If you pass without correction, no restriction appears.

What if I fail the vision test once?

Most states let you retake it the same day or within a few days at no extra charge. If you fail a second time, you'll usually need to see an eye doctor and bring a signed form confirming your vision meets the state standard before you can retake the DMV test.

Do I need a recent eye exam to take the vision test?

No. The DMV does its own vision screening. You only need an eye exam if you fail the DMV test twice and the state requires a doctor's form, or if you want to know your prescription before you go in.

What vision standard does my state use?

Most states require 20/40 vision; some require 20/30. Check your state's DMV website for the exact standard. If you're unsure whether you'll pass, an eye doctor can tell you before you go to the DMV.

If I pass the vision test, can I drive without my glasses?

Only if you passed without wearing them. If you wore glasses during the test, your permit requires you to wear them while driving. Driving without the required correction is a violation, even if you can technically see.