What the vision test checks and why states require it
Every state requires a vision test before issuing or renewing a driver's license because poor eyesight directly affects your ability to see the road, read signs, and react to hazards. The test measures how clearly you can see at a distance — this is called visual acuity — and checks your peripheral vision (what you can see to the sides without moving your eyes). Some states also test for color blindness, though this is less common.
The test itself takes only a few minutes. You'll look into a machine called a vision screener or phoropter, read letters or symbols that get progressively smaller, and follow a light or object with your eyes. The examiner records whether you can see at the standard distance — usually 20/40 vision or better is required to pass, though some states allow 20/60 with corrective lenses. If you wear glasses or contacts, you'll be tested both with and without them.
The vision requirement exists because it's a safety baseline. A driver who cannot see clearly enough to read a street sign at 40 feet or spot a pedestrian in their peripheral vision poses a real risk to themselves and others on the road.
Key Takeaways
- Vision tests at the DMV measure how clearly you see at a distance and check your peripheral vision using a machine that takes a few minutes to complete.
- Most states require 20/40 vision or better to pass; if you wear glasses or contacts, you can pass while wearing them, but the DMV will note that on your license.
- If you fail the test, you can retake it when ready or after a short wait, and you can bring your own glasses or contacts to use during the test.
- Some states allow you to take a vision test at an eye doctor's office instead of the DMV, and those results can be submitted to satisfy the requirement.
- Failing a vision test does not automatically disqualify you from getting a license — you have options to retest or correct your vision before trying again.
What happens if you fail the vision test
Failing the vision test at the DMV does not mean you cannot get a license. You can usually retake it the same day or within a few days, depending on your state's policy. Many states allow you to step out, get your glasses adjusted, or straightforward take a break and come back to try again without waiting weeks.
If you fail a second time, the next step depends on your state. Some states will issue you a restricted license that limits when or where you can drive — for example, daylight hours only or within a certain distance of your home. Other states require you to visit an eye doctor, get a corrective prescription, and return to the DMV with proof that you've been examined. A few states will deny your license outright until you pass the vision test, but this is less common.
The key is to know your state's specific rule before your appointment. Call your local DMV or check your state's DMV website to find out whether you can retake the test the same day, what happens after a second failure, and whether an eye doctor's report can substitute for the DMV test.
Bringing glasses or contacts to your DMV appointment
You are allowed to wear glasses or contacts during the vision test. In fact, if you normally wear them while driving, you should bring them to your appointment. The DMV will test you both with and without correction, and if you pass while wearing them, your license will be marked with a corrective lens restriction — a note that says you must wear glasses or contacts whenever you drive.
If you wear bifocals or progressive lenses, bring those specific glasses. If you have a new prescription, bring your most recent glasses or contacts. The DMV is not testing whether your prescription is perfect — it's testing whether you can see well enough to drive safely with the correction you actually use.
If you forget your glasses or contacts, ask the DMV whether you can reschedule rather than taking the test without them. Failing because you didn't bring your correction is avoidable and will delay your license.
Getting a vision test from an eye doctor instead
Many states allow you to have a vision test performed by an optometrist or ophthalmologist and submit the results to the DMV instead of taking the test at the license office. This option is useful if you want to get your eyes checked by a professional, update your prescription, or avoid a trip to a busy DMV office.
The eye doctor will perform the same basic test — measuring visual acuity and checking peripheral vision — and will provide you with a form or letter stating the results. You then bring this document to the DMV when you explore for or renew your license. Some states have a specific form the eye doctor must use; others accept any written report from a licensed eye care provider.
Check your state's DMV website or call ahead to confirm that your state accepts outside vision tests and what documentation the eye doctor needs to provide. Not all states allow this option, and some have time limits — for example, the test must have been done within the last 30 or 60 days.
Vision standards vary by state and license type
The vision requirement is not the same everywhere. Most states require 20/40 vision or better, but some allow 20/60 with corrective lenses. A few states have stricter standards for commercial driver's licenses (CDLs) — typically 20/40 in each eye separately, not combined. Some states also test for color blindness or require a wider field of peripheral vision for certain license types.
If you are renewing a license you already hold, your state may have different rules than for a first-time applicant. Some states do not retest vision at every renewal; others do. A few states only test vision if you report a change in your vision or if you're over a certain age.
The safest approach is to check your specific state's DMV website or handbook before your appointment. Search for "vision requirements" or "eye test" on your state DMV site, or call the office where you plan to take your test and ask what the standard is.
What to do if you have a medical condition affecting your vision
If you have a condition like cataracts, macular degeneration, diabetic retinopathy, or another eye disease, you may still be able to get a license, but you'll need documentation from an eye doctor. The DMV will want to see a report from an optometrist or ophthalmologist stating your current visual acuity and whether your condition is stable or progressive.
Some states have a medical review process for drivers with vision problems or other health conditions that could affect driving safety. You may be asked to submit medical records, undergo additional testing, or be issued a license with restrictions — such as no night driving or no highway driving. This is not automatic disqualification; it's a way for the state to confirm that you can drive safely under certain conditions.
If you know you have a vision condition, contact your state DMV before your appointment and ask what documentation you'll need to bring. Getting this sorted in advance prevents delays and failed tests.
Preparing for your vision test appointment
On the day of your test, wear your glasses or contacts if you normally drive with them. Get a good night's sleep the night before — fatigue can affect how you perform on the test. If you've just had your eyes dilated at an eye doctor's office, wait a few hours before taking the DMV vision test, as dilated pupils can temporarily affect your vision.
Arrive early so you're not rushed. The vision test itself is quick, but if you fail and want to retake it the same day, you'll need time between attempts. If you're nervous about the test, remember that it's designed to be passable for anyone with normal or corrected vision — the machine is straightforward, and the examiner will explain what you need to do.
Bring your current glasses or contacts, your ID, and any other documents your state requires for your license process or renewal. If you have an eye doctor's report, bring that too. The more prepared you are, the smoother the process will go.
Frequently Asked Questions
Can I wear sunglasses during the vision test?
No. The vision screener requires you to look into the machine without sunglasses or tinted lenses. You can wear them before and after the test, but not during it. If you have light-sensitive eyes, mention this to the examiner — they may be able to dim the machine or adjust the test slightly.
What if I'm colorblind — will I fail the vision test?
Most states do not test for color blindness as part of the standard vision test, and colorblindness alone will not disqualify you from driving. A few states do screen for it, but even if you fail that part, you can usually still get a license. Ask your DMV whether color blindness testing is part of your state's requirement.
Do I need to pass the vision test before I can take the written driving test?
This varies by state. Some states require you to pass the vision test first, before you're allowed to take the written or road test. Others test vision and knowledge on the same day in any order. Check your state's DMV website or call ahead to find out the order of tests at your location.
How often do I have to retake the vision test when I renew my license?
This depends on your state and your age. Some states retest vision at every renewal; others only retest every few renewals or after a certain age (often 70 or 75). A few states only retest if you report a change in your vision. Your state's DMV website or renewal notice will tell you whether a vision test is required for your renewal.
Can I use my phone to read the letters on the vision test machine?
No. The vision test must be done by looking into the machine itself. You cannot use your phone, a printed chart, or any other aid. The machine is designed to measure your actual vision under controlled conditions, so the test has to be done the way the examiner instructs.