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

The vision test for a driver's license is a quick screening at the DMV that checks how clearly you see objects at a distance and whether you have any major blind spots. It does not diagnose eye disease or prescribe glasses — it straightforward confirms you meet the minimum sight standard your state requires to hold a license.

Most states require you to see at least 20/40 vision in each eye, with or without correction (glasses or contacts). Some states are stricter and require 20/30 or better. The test itself takes about two minutes and happens before you take the written or road test.

Key Takeaways

  • The vision test checks how clearly you see at a distance using a chart with letters that get smaller as you read down.
  • You can wear glasses or contacts during the test, and the DMV will note on your license if correction is required.
  • If you fail, you can usually retake it the same day after a short wait, or come back another time.
  • Failing the vision test does not mean you cannot get a license — it means you need to correct your vision and try again.
  • Some states also check your peripheral vision and ability to see colors, though these are less common.

How the standard eye chart test works

You stand about 20 feet from a wall-mounted chart (called a Snellen chart) that has rows of letters. The top row has one large letter; each row below has smaller letters. You read the smallest line you can see clearly, one eye at a time, while the DMV worker records what you see.

The number 20/40 means you can see at 20 feet what a person with standard vision sees at 40 feet. If you read down to the 20/40 line, you meet the minimum in most states. If you can only read the 20/60 line, you do not meet the standard and will be asked to correct your vision and retest.

The test is pass or fail — there is no score in between. You either see well enough or you do not. If you wear glasses or contacts, wear them to the DMV. The test measures your vision with correction, not without it.

What happens if you wear glasses or contacts

Bring your current glasses or contacts to your DMV appointment. You will take the vision test while wearing them. If you pass, the DMV will print a restriction code on your license stating that corrective lenses are required whenever you drive.

If you wear bifocals or progressive lenses, tell the DMV worker before the test. They may ask you to look through different parts of the lens to make sure you can see the chart clearly. This is normal and does not affect whether you pass.

If you have recently changed your prescription, wear your newest glasses or contacts. An outdated prescription might cause you to fail a test you would pass with current correction.

Failing the vision test and what comes next

If you do not see well enough to pass, you have options. Many DMV locations let you retake the test the same day after waiting a short time. Some require you to schedule another appointment.

Before you retake the test, see an eye doctor. You may need a new prescription, or there may be an eye health issue the doctor can address. Bring any new glasses or contacts prescription to your next DMV visit. The DMV does not require a doctor's note — just bring your new correction and test again.

If you fail multiple times, some states require you to submit a vision report from an eye doctor before you can test again. Check your state's DMV website to see what it requires after a failed vision test.

Other vision checks some states perform

Beyond the standard letter chart, some states also test your peripheral vision — how far to the left and right you can see without moving your eyes. This is usually done with a straightforward machine where you look straight ahead and press a button when you see a light appear at the edge of your vision.

A few states check color vision to make sure you can see red and green traffic lights clearly. This is less common and usually only required if you failed a previous color test or reported a color vision problem on your process.

These additional tests are quick and use the same pass-or-fail standard as the main vision test. If you do not pass, you follow the same process: correct your vision or address the underlying issue, then retest.

How vision requirements differ by state

Most states require 20/40 vision as the minimum, but some are stricter. A few states require 20/30 or even 20/25. A small number of states allow 20/50 or 20/60 if you have a restricted license (for example, daytime driving only).

Your state's DMV website lists the exact requirement. If you are moving to a new state, check that state's standard before you explore for a license there — your current license may not meet the new state's vision requirement.

What the vision test does not check

The DMV vision test is not a comprehensive eye exam. It does not screen for glaucoma, cataracts, macular degeneration, or other eye diseases. It does not measure your ability to see in dim light or adjust to glare from oncoming headlights. It only checks how clearly you see letters on a chart in normal lighting.

If you have concerns about your eye health beyond what the DMV tests, schedule an appointment with an optometrist or ophthalmologist. They can perform a full exam and catch problems the DMV screening would miss.

Frequently Asked Questions

Can I wear sunglasses during the vision test?

No. You must remove sunglasses and any tinted eyewear. If you have light-sensitive eyes, tell the DMV worker — they may be able to dim the room slightly or adjust the lighting, but you cannot wear shades during the test itself.

What if I cannot read English well?

The standard vision test uses letters, not words, so reading ability does not matter. You only need to identify which letter you see. Some DMV locations offer the test in other languages or with symbols instead of letters — call your local DMV to ask what options are available.

Do I need a doctor's note to pass the vision test?

No. The DMV does its own test. You only need a doctor's note if you fail and your state requires one before you can retest, or if you are explore for a restricted license due to a medical condition.

Can I retake the vision test if I think I made a mistake?

Yes. If you fail, ask the DMV worker whether you can retake it the same day. Many locations allow one retest when ready. If you want to try again after that, you usually need to schedule a new appointment or come back another day.

What if I have one eye that sees much better than the other?

The DMV tests each eye separately. Both eyes must meet the minimum standard, or you must wear correction that brings both eyes up to the standard. If one eye is significantly weaker, your eye doctor may recommend a specific type of lens or correction to help.