What a DMV eye exam tests and why you need one
A DMV eye exam measures your vision to confirm you can see well enough to drive safely. The test checks how clearly you see at distance, how wide your field of vision is, and whether you have color blindness that affects traffic signals. Most states require this exam before you get your first license, renew an expired license, or if an officer suspects a vision problem during a traffic stop.
The exam itself takes about five to ten minutes. An examiner will have you read letters or numbers on a chart from a set distance, usually 20 feet away. You'll look through a machine called a phoropter that shows you different lens strengths to find which one lets you see most clearly. Some states also test your peripheral vision — how much you can see to the sides without moving your eyes — and check for color blindness using a chart with colored dots.
You do not need to bring glasses or contacts, but you should wear them if you normally do while driving. If you wear them during the exam, the DMV will note that on your license, and you are legally required to wear them every time you drive.
Key Takeaways
- DMV eye exams test distance vision, peripheral vision, and color perception to confirm you can drive safely.
- The test takes five to ten minutes and uses a phoropter machine to measure your vision strength.
- Wear your glasses or contacts during the exam if you wear them while driving, because the DMV will restrict your license if you do.
- Vision requirements vary slightly by state, but most require 20/40 vision or better in at least one eye, and some allow corrective lenses to meet that standard.
- If you fail the exam, you can usually retake it the same day or within a few days, and some states let you bring a recent eye doctor's report instead of taking the DMV test.
Vision standards that vary by state
Most states require you to see 20/40 or better in at least one eye to pass. This means you can read letters from 20 feet away that a person with standard vision can read from 40 feet away. A few states are stricter and require 20/30 vision. Some states allow you to meet the standard with glasses or contacts, while others require uncorrected vision to meet a higher bar and only allow correction to bring you up to the minimum.
Your peripheral vision — the area you can see to the sides — must usually be at least 140 degrees in total. This is tested less often than distance vision, usually only if you report a condition that affects side vision or if you fail distance vision and the examiner suspects another problem.
Color blindness does not automatically disqualify you in any state, but some states test for it and note it on your record. Red-green color blindness is the most common type and does not prevent you from driving safely because traffic lights use position and brightness as well as color.
When you can substitute an eye doctor's report for the DMV test
Many states let you bring a recent report from an optometrist or ophthalmologist instead of taking the DMV eye exam. The report must be dated within the last 12 months in most states, though some accept reports up to two years old. The eye doctor's report must include your distance vision measurement, peripheral vision if tested, and a statement that you are safe to drive.
This option is useful if you have just had an eye exam for glasses or contacts and do not want to pay for a second test. Call your DMV before your appointment to confirm they accept reports from your eye doctor and what format they need — some states require a specific form that your eye doctor fills out, while others accept a standard vision report from your medical file.
If you bring an eye doctor's report, you still need to show up in person at the DMV to verify your identity and complete the rest of your license transaction. The report only replaces the vision test itself.
What happens if you fail the DMV eye exam
If you do not meet your state's vision standard, you have the right to retake the exam. Most DMVs let you retake it the same day or within a few days at no extra charge. Some states charge a small fee for a retest, usually between $5 and $15.
Between attempts, you can visit an eye doctor to get glasses or contacts if you do not have them, or have your prescription updated if your current one is outdated. Bring your new glasses or contacts to your retest. If you still do not pass, some states will issue you a restricted license that limits when and where you can drive — for example, daylight driving only, or no highway driving — until your vision improves.
A few states require you to see an eye doctor and bring a report showing your vision has improved before you can retake the DMV test. Check your state's rules before scheduling your retest, because the requirement varies.
Corrective lenses and license restrictions
If you wear glasses or contacts during the eye exam, your license will carry a restriction code that requires you to wear them while driving. This is a legal requirement, not a suggestion — driving without the correction you tested with can result in a ticket and points on your record.
Some states also restrict you based on the strength of your correction. If your prescription is very strong, your state may limit you to daytime driving or local roads only. These restrictions appear as codes on your license and are visible to police during a traffic stop.
If your vision changes and you get a new prescription, you do not automatically need to retake the DMV eye exam. You only need to update your license if the new prescription is significantly stronger or weaker, or if your state requires you to renew your license anyway. Check your state's rules or call your local DMV office to confirm whether a prescription change requires a new vision test.
Medical conditions that may affect your vision test
Certain eye conditions can make it hard to pass a standard DMV eye exam. Cataracts, macular degeneration, diabetic retinopathy, and severe astigmatism can all reduce your vision below the state minimum. If you have one of these conditions, an eye doctor can sometimes prescribe stronger glasses or special lenses that bring your vision up to the legal standard.
If you cannot meet the vision standard even with correction, you may still be able to drive with a restricted license in some states. Restrictions might include daylight driving only, a smaller geographic area, or a requirement to have a licensed driver in the car with you. The availability and terms of restricted licenses vary significantly by state.
If you have a condition that affects your vision or your ability to see, bring documentation from your eye doctor to your DMV appointment. The examiner can review it and may be able to work with you on testing accommodations or explain what restrictions might explore.
Frequently Asked Questions
Do I need to bring anything to my DMV eye exam?
Bring your glasses or contacts if you wear them while driving, your ID, and your appointment confirmation if you scheduled one. If you have a recent eye doctor's report you want to use instead of the DMV test, bring that too. You do not need to bring your prescription card or glasses prescription — the DMV does not need it.
What if I wear bifocals or progressive lenses?
Tell the examiner before the test starts. They will make sure you are looking through the correct part of the lens when they test your distance vision. Progressive lenses can sometimes make the test take a bit longer, but they do not disqualify you.
Can I fail the eye exam if I have astigmatism?
Astigmatism alone does not cause you to fail. The examiner measures your vision with the correction that works best for your eyes, including any astigmatism correction. If your astigmatism is severe and cannot be fully corrected, you might not meet the vision standard, but most people with astigmatism pass easily with the right glasses or contacts.
How often do I need to retake the eye exam?
You only retake the eye exam when you renew your license, which happens every four to eight years depending on your state and age. You do not need to retake it between renewals unless you are involved in a crash or a traffic stop where an officer suspects a vision problem.
What if I am colorblind — will I fail?
No. Color blindness does not disqualify you from driving in any state. Some states test for it and note it on your record, but it does not prevent you from getting or renewing a license. Traffic signals use position and brightness in addition to color, so colorblind drivers can still identify them safely.