What the eye test measures and why you need to pass it
The eye test for your driver's license checks whether you can see well enough to drive safely. Every state requires it before issuing or renewing a license. The test itself is short — usually five to ten minutes — and happens at the DMV or testing center on the same day as your written and road tests.
The examiner will check three things: how clearly you see at a distance (visual acuity), whether you have adequate side vision (peripheral vision), and whether you can distinguish colors, especially red and green traffic lights. You do not need perfect vision to pass. Most states allow you to pass with corrected vision — meaning glasses or contacts that bring your sight to the legal standard.
If you fail the eye test, you cannot take the road test that day. You will need to see an eye doctor, get a new prescription if necessary, and return to the DMV with updated vision documentation before you can reschedule.
Key Takeaways
- Bring your current glasses or contacts to the DMV, even if you do not always wear them — the test measures your best corrected vision.
- Most states require you to see at least 20/40 with correction in at least one eye, though standards vary by state.
- If you fail, you must see an eye doctor and bring proof of your new prescription or vision clearance before you can test again.
- The eye test happens before your road test, so arriving with clean glasses or fresh contacts prevents delays and retesting.
- Color blindness rarely disqualifies you, but severe color vision deficiency may restrict your license type in some states.
Prepare your vision before test day
If you wear glasses or contacts, make sure your prescription is current. An outdated prescription is the most common reason people fail the eye test. If your glasses are more than a year old or your contacts prescription has changed, see an eye doctor before your DMV appointment. You do not need a new exam if your vision has not changed, but the eye doctor can confirm that in writing.
On the morning of your test, clean your glasses thoroughly or insert fresh contacts. Smudged lenses or dry contacts will blur your vision and can cause you to fail a test you would otherwise pass. If you wear bifocals or progressive lenses, practice reading the chart at different distances beforehand so you know which part of the lens to look through.
If you have had recent eye surgery or a change in your vision, bring documentation from your eye doctor showing that you meet your state's vision standard. Some states will accept a letter from your doctor in place of retesting at the DMV.
What happens during the eye test at the DMV
The examiner will seat you in front of a machine called a vision screener or ask you to read a chart on the wall. You will cover one eye at a time and read letters or symbols that get progressively smaller. The examiner notes the smallest line you can read clearly. This measurement becomes your visual acuity score.
Next, the examiner checks your peripheral vision — your ability to see to the sides without moving your eyes. You will focus straight ahead while the examiner watches for your eye movement as objects appear in your side vision. This test takes less than a minute and requires no special effort on your part.
Finally, the examiner may show you colored circles or ask you to identify traffic light colors to check your color vision. This part is quick and rarely causes people to fail unless you have a severe color vision deficiency.
Vision standards by state
Most states require a minimum visual acuity of 20/40 with correction in at least one eye. Some states are stricter and require 20/40 in both eyes, or 20/30 in the better eye. A few states allow 20/60 in one eye if the other eye meets the standard. Your state's DMV website lists the exact requirement for your location.
If you are unsure whether your vision meets the standard, ask your eye doctor before your test. They can tell you your acuity number and whether it falls within your state's range. Bring that information to the DMV if you think you are borderline.
Peripheral vision requirements also vary. Most states require at least 140 degrees of vision in your field of view. If you have had eye surgery, an injury, or a condition that affects side vision, ask your eye doctor whether you meet this standard before scheduling your test.
What to do if you fail the eye test
If you fail, the DMV will give you a form stating what you need to do next. In most cases, you must see an eye doctor and bring back proof that your vision now meets the state standard. This proof can be a new prescription, a letter from your eye doctor, or a vision clearance form that your state's DMV provides.
Schedule your eye appointment as soon as possible. Many eye doctors can see you within a few days. Bring the DMV form with you so the doctor knows exactly what standard you need to meet. Once you have the documentation, return to the DMV with it. You will not need to pay another test fee in most states — you can reschedule your road test at no additional cost.
If you fail a second time after getting new glasses or contacts, ask the eye doctor whether there is an underlying vision problem that cannot be corrected. Some conditions like cataracts or macular degeneration may require treatment before you can pass. Your eye doctor can advise whether driving is safe for you at this time.
Common reasons people fail and how to avoid them
Smudged or dirty glasses are the easiest reason to fail and the easiest to prevent. Clean your lenses the morning of your test and keep them clean throughout the day. If you wear contacts, insert them fresh that morning and bring rewetting drops in case your eyes feel dry during the test.
An outdated prescription is the second most common reason. If your last eye exam was more than a year ago, schedule one before your DMV appointment. You do not need a full exam if nothing has changed — a quick check-in with your eye doctor takes 15 minutes and costs far less than rescheduling your road test.
Anxiety can affect your performance on the eye test, just as it can on the written test. Take a few deep breaths before you sit down at the vision screener. The examiner expects you to take your time reading each line. There is no penalty for hesitating or asking the examiner to repeat a line.
If you have astigmatism, nearsightedness, or farsightedness, your corrected vision should meet the standard as long as your prescription is current. Do not attempt the test without your glasses or contacts unless your state specifically allows uncorrected vision testing — most do not.
After you pass the eye test
Once you pass, the examiner will note your vision status on your test record and you will move on to the written test and road test the same day. Your passing score is valid for the life of that license, so you will not need to retake the eye test until you renew your license — usually every four to eight years depending on your state.
If your vision changes significantly between now and your next renewal, you can request an updated eye test at the DMV. Some states allow you to do this for free if your vision has worsened. Bring current glasses or contacts and ask the examiner whether you still meet the standard.
Frequently Asked Questions
Can I take the eye test without glasses or contacts if I usually wear them?
No. The test measures your best corrected vision, meaning the vision you have when wearing your prescription. If you wear glasses or contacts, you must wear them during the test. Taking the test without them and then failing will delay your road test.
What if I have one eye that is much weaker than the other?
Most states require 20/40 vision in at least one eye, so a weaker eye does not automatically disqualify you. However, some states require 20/40 in both eyes or have stricter standards. Check your state's DMV website or call ahead to confirm the requirement for your situation.
Will I fail if I am colorblind?
Most forms of colorblindness will not cause you to fail. You only fail if you cannot distinguish red and green traffic lights reliably. Severe color vision deficiency is rare and usually identified during an eye exam. If you have been told you are colorblind, ask your eye doctor whether it affects your ability to see traffic lights.
How long does the eye test take?
The eye test itself takes five to ten minutes. The entire DMV visit, including waiting time, written test, and road test scheduling, typically takes one to three hours depending on how busy the location is.
What if I just got new glasses and I am not used to them yet?
Wear your new glasses for a few days before your DMV appointment so you are comfortable with them. If you got new glasses the day before your test, you may want to reschedule — an unfamiliar prescription can make you second-guess yourself during the eye test, even if the prescription is correct.