The DMV vision test is a quick screening, usually under a minute, that checks whether you can read letters at 20/40 acuity in at least one eye. You can wear your glasses or contacts. Nearly every state uses that same 20/40 line, and the clerk tells you on the spot whether you passed. If you don’t, you’re not sent home without a license; you’re sent to an eye doctor with a form.
What the Screening Measures
Three things, in order of importance. How sharply you see straight ahead. How well you notice objects off to the side. And, in some places, whether you can tell the colors of traffic signals apart.
Acuity is the number that matters most. 20/40 means that from 20 feet away, you can read letters a person with perfect vision could read from 40 feet. You can meet the standard with one eye or both, and corrective lenses count toward the result. If your best-corrected vision falls between 20/40 and roughly 20/70, most states will still issue a license but attach conditions such as daylight-only driving. Below 20/70 the rules tighten, and some states draw a hard cutoff at 20/100 or 20/200.
Peripheral vision requirements vary by state. A common threshold for a standard license is around 110 degrees of horizontal field of view. Color vision is rarely part of a regular license screening; fewer than a quarter of states include any color requirement, and most that do apply it only to commercial drivers. Traffic signals use position cues (red on top, green on bottom) precisely because color deficiency is common, so color-blind applicants almost always pass a standard test.
How the Test Works at the Counter
You’ll either look into a vision-testing machine, often an Optec or Titmus device, or read a Snellen wall chart across the room. The machine version is more common because it controls lighting and distance automatically. You read a row of letters or numbers, the clerk checks whether you cleared the 20/40 line, and that part is done. Some offices also flash small lights at the edges of the viewing area to check peripheral vision.
There is no separate fee. The screening is bundled into your license application or renewal cost. The clerk tells you the result immediately, and it goes straight into your file.
Using an Eye Doctor’s Report Instead
You don’t always have to test at the DMV. Many states accept a vision report completed by a licensed eye care professional, which helps if you already know your vision is borderline or you want to avoid a second trip. Each state has its own form. The doctor records acuity for each eye, their license number, the exam date, and their signature.
Forms have to be submitted within a set window after the exam, ranging from six to twelve months depending on the state and the type of provider. An ophthalmologist or optometrist can note a shorter validity period if they think your condition may change quickly. Download the correct form from your state’s DMV website before the eye appointment. A report on the wrong form, or one missing a required field, means starting over.
What Happens If You Fail
Failing the screening does not cost you your license on the spot. The usual sequence:
- Professional exam. The DMV refers you to an ophthalmologist or optometrist. If a new prescription brings you back to 20/40, the doctor completes the state’s vision form and you return to retest or submit the paperwork.
- Restricted license. If corrected vision falls short of 20/40 but meets a lower threshold (often 20/70), many states issue a license with conditions such as daylight-only driving, certain road types only, or extra mirrors.
- Supplemental driving evaluation. Some states offer a behind-the-wheel assessment for borderline cases. An examiner rides with you to see whether scanning habits and mirror use compensate for reduced vision.
- Medical review board. If the DMV denies or restricts your license, most states let you request a hearing before a medical advisory board with your doctor’s records and testimony.
The worst outcome for someone who cannot meet even the reduced standards is denial or revocation, and that decision is not immediate. You’ll have notice and a chance to submit additional medical evidence first.
The Corrective Lenses Restriction
If you pass while wearing glasses or contacts, your license carries a permanent restriction requiring you to wear corrective lenses whenever you drive. Most states label this “Restriction B,” though the letter varies. Officers can see it on any traffic stop, and driving without your lenses while carrying the restriction is a citable offense.
Penalties differ widely. Some states treat it as a minor infraction with a fine in the low hundreds. Others classify it as a misdemeanor that can add points to your record, higher fines, or even brief jail time in extreme cases. The violation also gives an officer grounds to question whether you were driving safely at all, which can compound consequences if you were stopped for something else.
Removing the Restriction After Surgery
If you’ve had LASIK, PRK, or another corrective procedure and no longer need glasses, you can’t simply start driving without them. The restriction stays on your license until you go back to the DMV, retake the screening without lenses, and pass at 20/40. A letter from your surgeon alone won’t do it. Until the restriction is formally removed, you’re technically required to wear lenses you no longer need, and you can still be ticketed if you don’t. Most states charge a small duplicate-license fee to issue the updated card.
Age-Based Rules at Renewal
More than half of states tighten renewal requirements once a driver reaches a certain age, usually 65 or 70. The most common change is mandatory in-person renewal with a vision screening, even in states where younger drivers can renew online or by mail. About 19 states specifically require more frequent vision testing at renewal for older drivers, and roughly 17 states plus the District of Columbia prohibit mail-in or online renewals for seniors altogether.1National Highway Traffic Safety Administration. In-Person Renewal and Vision Test
Some states also shorten the renewal cycle itself. A state that renews every four or eight years for most adults might switch to every two years at age 81 and annually after 87. Your vision gets checked far more often as you age, which matters because cataracts, macular degeneration, and glaucoma develop gradually. If you’re approaching one of these thresholds, schedule an eye exam before your renewal date so there are no surprises at the counter.
A Note on Commercial Licenses
If you’re testing for a commercial driver’s license, the standards are higher and the general DMV screening doesn’t apply the same way. Federal rules require at least 20/40 acuity in each eye individually and together, at least 70 degrees of horizontal field in each eye, and the ability to recognize standard traffic signal colors.2eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers The critical difference is per-eye testing. Someone who qualifies for a regular license using their better eye would need a federal vision exemption to drive commercially.
How to Prepare
- Bring your current glasses or contacts. If the prescription is more than a year or two old, update it first. An outdated prescription that no longer corrects you to 20/40 means a failed screening.
- Download your state’s vision report form in advance if you plan to use an outside eye doctor. Fill in your section before the appointment so the doctor only completes the clinical fields.
- Check the form’s expiration window. Most states accept reports completed within the last six to twelve months. Submitting an expired form wastes the trip.
- Know your state’s renewal rules. Some states screen at every renewal, others only at initial application and again after a certain age.
If you already suspect your vision is borderline, see an optometrist before the DMV visit. The doctor can tell you exactly where you stand, adjust your prescription if possible, and complete the paperwork in one appointment. Walking in and hoping for the best is how people end up making two trips.