The vision test is a separate requirement from the written knowledge test, and you must pass it to get or renew your license
The vision screening at the DMV checks whether you can see well enough to drive safely. It is not the same as an eye exam at an optometrist's office — the DMV test is shorter and focuses only on what matters for road safety. You will read letters or numbers on a chart from a set distance, usually about 20 feet away, and the examiner will note the results in your file.
Most states require you to see at least 20/40 vision in each eye, with or without corrective lenses like glasses or contacts. If you wear glasses or contacts while driving, you must wear them during the test. Some states allow a slightly lower standard if you have a medical reason, but this varies widely and requires documentation from an eye doctor.
The test itself takes about two to three minutes. You will stand in front of a chart (usually a Snellen chart or similar), cover one eye at a time, and read the smallest line of letters you can see clearly. The examiner records what you can read and whether you passed the minimum threshold for your state.
Key Takeaways
- You must pass the vision test to receive or renew a driver's license, and the requirement is separate from the written knowledge test.
- Most states require 20/40 vision or better in each eye, with correction if you normally wear glasses or contacts while driving.
- Wear your glasses or contacts to the DMV if you use them for driving, because the test measures your actual driving vision, not your uncorrected vision.
- If you fail the vision test, you can retake it at your next visit, but some states require you to see an eye doctor first and bring a signed form confirming you meet the standard.
What happens if you fail the vision test
If you do not meet your state's vision standard, you will not pass the test. The examiner will tell you the result before you leave the DMV. You cannot move forward with your license process or renewal until you pass.
Some states let you retake the vision test when ready or on the same day. Others require you to schedule a separate appointment or to see an eye care professional first. A few states will issue you a restricted license that limits when or where you can drive — for example, daylight driving only — if your vision is close to the standard but not quite there. Check your state's DMV website or call ahead to learn the exact rule where you live.
If you know your vision is poor, see an eye doctor before you go to the DMV. An optometrist or ophthalmologist can tell you whether you meet the standard and can prescribe glasses or contacts if you need them. Bringing a signed statement from your eye doctor showing you meet the vision standard can speed up the process if you fail the DMV test.
Corrective lenses and the vision test
If you wear glasses or contacts to drive, you must wear them during the vision test. The DMV is testing your actual driving vision — the vision you will have behind the wheel — not your natural eyesight. Your license will be marked to show that correction is required, and you are legally required to wear your glasses or contacts whenever you drive.
If you wear bifocals or progressive lenses, tell the examiner before the test starts. Some people see the chart more clearly through the top or bottom part of their lenses, and the examiner may ask you to position your head in a certain way to get an accurate reading.
Contact lens wearers should make sure their lenses are clean and properly fitted before the test. If you have recently changed your prescription or gotten new glasses, wear them to the DMV so the examiner can test your current vision correction.
State-by-state vision standards
Most states use 20/40 as the minimum standard, but some are stricter or allow exceptions. A few states require 20/30 vision, while others accept 20/50 or 20/60 under certain conditions. Some states test color vision or peripheral vision as well, though this is less common.
States also differ on what happens if you fail. Some allow an when ready retest; others require a visit to an eye doctor. A handful of states issue restricted licenses for people who do not quite meet the standard but are still safe to drive under certain conditions — for example, no highway driving or no driving at night.
Your state's DMV website will list the exact vision standard and what to do if you do not meet it. If you are renewing from out of state or moving to a new state, check the requirements before your appointment, because they may be different from what you are used to.
Medical conditions that affect the vision test
Certain eye conditions — cataracts, macular degeneration, diabetic retinopathy, or severe astigmatism — can make it hard to pass the vision test even with correction. If you have a condition that affects your sight, see an eye doctor before you go to the DMV. Your doctor can tell you whether you meet the standard and can provide documentation if you do.
Some states allow people with certain medical conditions to take the test under modified conditions — for example, using a larger-print chart or taking the test in a quieter room. You will need a letter from your eye doctor explaining the condition and the modification needed. Bring this letter to the DMV when you take the test.
If you do not meet the vision standard and your condition is permanent, you may not be able to get a regular driver's license. Some states offer restricted licenses or may refer you to a driving rehabilitation specialist who can assess whether you can drive safely with modifications.
Preparing for the vision test
The best preparation is straightforward: wear your glasses or contacts if you use them for driving, and make sure your prescription is current. If you have not had an eye exam in more than a year, consider scheduling one before your DMV appointment. An outdated prescription can cause you to fail a test you would otherwise pass.
On the day of your test, make sure you are well-rested and your eyes are not tired or irritated. If you wear contacts, put them in before you leave home so they settle. If you wear glasses, clean the lenses before you go. Avoid rubbing your eyes right before the test, as this can temporarily blur your vision.
Bring your current glasses or contacts to the DMV even if you think you might not need them. If the examiner has any doubt about your vision, having your correction available can help clarify the result.
Frequently Asked Questions
Can I wear sunglasses during the vision test?
No. The examiner needs to see your eyes clearly and needs you to see the chart without any tint or obstruction. Remove sunglasses and any other eyewear except your regular glasses or contacts before the test begins.
What if I fail the vision test but I know I can see well enough to drive?
The DMV standard exists for safety reasons, and you cannot override it by arguing your case. Your best option is to see an eye doctor, get a current prescription if needed, and retake the test. If you have a medical condition that affects your vision, bring documentation from your eye doctor to your next DMV visit.
Do I have to take the vision test every time I renew my license?
Yes. Most states require a vision test at every renewal, though some allow you to skip it if your last test was very recent and you have not had any eye surgery or major changes to your vision. Check your state's rules, but assume you will need to take it again.
What if I wear different glasses for distance and reading?
Wear the glasses you use for driving. If you use bifocals or progressive lenses for driving, wear those. Tell the examiner which lenses you use most while driving so they can test your actual driving vision.
Can I bring my own eye chart or test results from my eye doctor?
No. The DMV must conduct the test itself using its own equipment and standards. However, if you fail the DMV test, a signed letter from your eye doctor stating that you meet the vision standard can help you challenge the result or may allow you to retake the test under different conditions, depending on your state.