What the vision test checks and how it works

Your vision test at the DMV measures how well you can see at distance and near, and whether you have color blindness or other vision problems that affect driving safety. The test itself takes about five minutes and happens before you take the written exam or road test.

The standard test uses a machine called a vision screener or an eye chart on the wall. You look into the machine or at the chart from a set distance — usually 20 feet — and read letters or numbers that get smaller. The examiner records what you can read clearly. Some DMVs also test your peripheral vision (what you see to the sides without moving your eyes) and your ability to see in color.

You do not need to pass with perfect vision. Every state sets a minimum standard, but most allow you to pass with corrected vision — meaning glasses or contact lenses count. If you wear them for driving, you must wear them during the test.

Key Takeaways

  • Bring your glasses or contacts if you wear them while driving, because the test measures your vision with correction.
  • The minimum vision standard varies by state, but most require at least 20/40 vision in each eye or 20/30 with both eyes combined.
  • If you fail the vision test, you can usually retake it the same day or schedule another appointment within a few days.
  • Some states require an eye doctor's report if your vision is below the standard, before you can get a license.

Minimum vision requirements by state

States do not all use the same standard. Most require 20/40 vision in each eye separately, or 20/30 when both eyes are tested together. A few states are stricter — requiring 20/30 in each eye — and a handful allow 20/50 or 20/60 with correction. The number after the slash tells you how far away you have to be to see what a person with normal vision can see from 20 feet away.

Your state's DMV website lists its specific standard. If you are moving to a new state or renewing your license in a different state, check that state's requirement before you go in, because it may be different from what you are used to. Some states also have separate standards for commercial driver's licenses, which are stricter.

If your vision is worse than your state's minimum, you will not pass the test. You can still get a license in most cases, but you will need a report from an eye doctor (an optometrist or ophthalmologist) showing that you meet the standard with glasses or contacts. Some states also require you to wear a restriction on your license — a note that says you must wear corrective lenses while driving.

What happens if you fail the vision test

Failing does not mean you cannot get a license. It means you need to either improve your vision with correction or provide proof from an eye doctor that you meet the standard.

At most DMVs, you can retake the vision test the same day at no extra cost. If you wear glasses or contacts and failed without them, put them on and try again. If you failed even with correction, you have two paths: get an updated eye exam and bring the doctor's report to the DMV, or schedule a new appointment after you have had time to see an eye doctor.

Some states require the eye doctor's report before you can retake the test. Others let you retake it when ready and only ask for the report if you fail a second time. Call your local DMV to find out which applies to you.

How to prepare for your vision test

If you wear glasses or contacts, wear them to your appointment. The test measures your vision as you actually drive, so if you drive with correction, the test should happen with correction. Bring your glasses case or contact lens case in case you need to remove them during the test.

If you have had recent changes to your vision — new glasses, a new prescription, or blurry vision that is new — see an eye doctor before your DMV appointment. You do not want to fail the test and then find out you need a new prescription. An eye exam costs less than retaking the DMV test and dealing with the delay.

Get a good night's sleep before your appointment. Tired eyes perform worse on vision tests. Avoid driving for long distances right before the test, as that can also strain your eyes temporarily.

Color blindness and other vision conditions

Most states test for color blindness as part of the vision screening. If you are color blind, you can still get a license in all states — color blindness alone does not disqualify you. However, some states note it on your license or ask you to acknowledge it.

Other vision problems — like astigmatism, nearsightedness, or farsightedness — do not automatically disqualify you either, as long as your corrected vision meets the state minimum. If you have a condition like cataracts, macular degeneration, or diabetic retinopathy, you may need an eye doctor's report to show that your vision is stable and safe for driving.

If you have had eye surgery or a recent change in vision, bring documentation from your eye doctor. The DMV may require a report before you can test, or it may allow you to test and then provide the report if needed.

Vision test requirements for license renewal

Most states require a vision test every time you renew your license, even if your vision has not changed. A few states only require it at certain renewal cycles — for example, every other renewal — or only if you are over a certain age. Check your state's DMV website to see whether your renewal will include a vision test.

If you are renewing by mail or online in a state that allows it, you may not need to take a vision test in person. However, if your state requires an in-person renewal, the vision test is part of that appointment. Some states also allow you to get a vision test from an eye doctor and submit the results instead of taking the DMV test.

Frequently Asked Questions

Can I wear my glasses during the vision test?

Yes. Wear whatever correction you normally use while driving. The test measures your vision as you actually see while on the road, so if you drive with glasses or contacts, the test should happen with them on.

What if I fail the vision test but I know my vision is fine?

Ask to retake it when ready. Vision tests can be affected by fatigue, stress, or not understanding the instructions. If you fail a second time, see an eye doctor to rule out a vision change you did not notice. Bring the eye doctor's report to the DMV.

Do I need an eye exam before I go to the DMV?

Not unless your vision has recently changed or you know it is worse than your state's minimum. If you are unsure, an eye exam costs less than dealing with a failed test and a delayed license.

Will a vision restriction on my license affect my driving?

A restriction means you must wear your glasses or contacts while driving — it does not limit where you can drive or what you can drive. You can ignore it and drive without correction, but you are breaking the law and your insurance may not cover an accident if you were not following the restriction.

Can I get a license if I am blind in one eye?

It depends on your state and your vision in the other eye. If your good eye meets the state minimum with or without correction, you can get a license. Some states require an eye doctor's report or add a restriction to your license. Contact your state DMV to find out the specific rule.