The DMV eye chart test measures how well you see at a distance

The DMV uses an eye chart — usually a Snellen chart or similar vision screening tool — to check whether you can see well enough to drive safely. The test is quick, happens at the counter or in a separate vision station, and takes about one minute. You read letters or symbols that get progressively smaller as you move down the chart, starting from about 20 feet away.

Every state requires this test before issuing or renewing a driver's license. The specific chart used, the passing score, and what happens if you fail vary slightly by state, but the basic process is the same everywhere.

Key Takeaways

  • The DMV eye chart test checks your distance vision and is required for all driver's license applications and renewals.
  • You must read at least the 20/40 line on the chart with or without corrective lenses to pass in most states; some states require 20/30.
  • If you wear glasses or contacts, bring them to your DMV appointment — you will be tested with them on if you use them while driving.
  • Failing the vision test does not automatically deny your license; most states allow you to retake it or bring a vision report from an eye doctor.
  • The test does not check for color blindness, depth perception, or peripheral vision — only how clearly you see straight ahead.

What the passing score is and how it's measured

The standard passing vision requirement is 20/40 or better in most states, meaning you can read at 20 feet what a person with standard vision reads at 40 feet. Some states set the bar at 20/30. A few states allow 20/50 with restrictions, such as daytime-only driving or a note on your license.

The chart itself has rows of letters that shrink in size. You stand or sit at the marked distance — usually 20 feet, sometimes simulated with mirrors in smaller DMV offices — and read aloud what you see. The examiner marks which line you can read clearly. If you can read the 20/40 line with one or both eyes, you pass. If you cannot, the examiner will ask you to cover one eye and try again, because some people have one stronger eye.

The test is done with your corrective lenses on if you wear them. If you wear glasses or contacts while driving, you must wear them during the test. If you do not normally wear them while driving, you take the test without them. Your license will note any restrictions — for example, "corrective lenses required" — and you must follow that restriction or risk a ticket.

What to bring and how to prepare

Bring your current glasses or contacts if you wear them while driving. You do not need to do anything special to prepare. The DMV does not send you a practice chart ahead of time, and studying will not change your vision on the day of the test.

If you have had recent eye surgery, a new prescription, or a change in your vision, consider visiting an eye doctor before your DMV appointment. An eye doctor can tell you whether you will pass and can provide a vision report if you fail the DMV test. Some states allow you to bring a doctor's report instead of retaking the DMV test.

Wear clean glasses if you use them — smudges can make letters harder to read and may cause you to fail when you would otherwise pass. If your prescription has changed significantly since your last eye exam, get new glasses before your appointment.

What happens if you fail the vision test

Failing the DMV eye chart does not mean you cannot get a license. Most states allow you to retake the test on the spot or schedule another appointment to try again. Some DMVs let you take it twice in one visit; others require you to come back on a different day.

If you fail twice, or if the examiner believes your vision is too poor to drive safely, you can bring a written report from an optometrist or ophthalmologist stating that you meet your state's vision standard. The DMV will accept the doctor's report in place of the chart test. This route takes longer — you have to schedule an eye exam and wait for the report — but it is available in every state.

Some states also allow you to request a restricted license if your vision is below the standard but above a certain threshold. A restricted license might limit you to daytime driving, driving within a certain distance of home, or driving only on familiar routes. The restrictions appear on your license, and violating them is a traffic violation.

Differences in vision standards by state

Most states use 20/40 as the passing standard, but a few are stricter. California, for example, requires 20/40 in each eye separately, not combined. New York requires 20/40 in at least one eye and 20/70 in the other. Some states allow 20/50 with a restriction or a note on the license.

A handful of states test peripheral vision or require a separate color blindness screening, though this is rare. The vast majority use only the distance vision chart. If you are moving to a new state or renewing a license in a state where you have not lived before, check your state's DMV website for the exact standard, because it can affect whether you pass on your first try.

If you hold a commercial driver's license (CDL), the vision standard is stricter: usually 20/25 in each eye, with a combined vision of at least 20/40. CDL holders also must pass a peripheral vision test in most states.

What the eye chart does and does not test

The DMV eye chart tests only your distance vision — how clearly you see objects far away, like road signs and other vehicles. It does not test color blindness, depth perception, night vision, peripheral vision, or your ability to see close objects. These are all important for safe driving, but the DMV does not screen for them as part of the standard vision test.

If you have concerns about any of these other aspects of your vision — for example, if you have trouble seeing at night or judging distances — talk to an eye doctor. They can run more detailed tests and advise you on whether it is safe for you to drive. The DMV eye chart is a basic safety gate, not a complete vision evaluation.

Frequently Asked Questions

Can I wear sunglasses during the DMV eye chart test?

No. You must remove sunglasses and any tinted eyewear. If you wear prescription glasses or contacts, you wear those. If you wear regular glasses without a prescription, you can wear them. The examiner needs to see your eyes clearly and needs you to see the chart without any obstruction.

What if I just got a new glasses prescription?

Wear your new glasses to your DMV appointment. You will be tested with them on, and your license will note that corrective lenses are required. Make sure your new prescription is accurate before you go — if the glasses are not right, you might fail the test even though your vision is correctable.

Do I have to pass the eye chart to renew my license?

Yes. Every state requires a vision test for license renewal, though some states allow you to renew by mail or online if you passed the test at your last renewal and have no medical conditions that affect your vision. Check your state's DMV website to see whether an in-person test is required for your renewal.

What if I fail the eye chart but I know I can see well enough to drive?

You can retake the test at the DMV, usually on the same day or at a later appointment. If you fail again, bring a written report from an eye doctor stating that your vision meets your state's standard. The DMV will accept the doctor's report and issue your license without requiring you to pass the chart test.

Does the eye chart test for color blindness?

Not in most states. The standard DMV eye chart does not test color blindness. A few states include a separate color blindness screening, but it is not common. If you are color blind and concerned about your ability to see traffic lights, talk to your eye doctor — color blindness alone does not disqualify you from driving in any state.