The vision test for driving is a short screening the DMV uses to confirm you can see well enough to drive safely. In most states you need at least 20/40 corrected vision in your better eye, and roughly two-thirds of states also check your peripheral vision. The whole thing usually takes about two minutes.
What the Screening Looks Like at the DMV
Most DMV offices use a dedicated vision screening machine rather than a wall chart. You step up to the device, rest your forehead against it, and look into the eyepiece. Inside, rows of letters or numbers appear at simulated distances, and the examiner asks you to read them. The same machine can flash lights in your peripheral field to test side vision, and some versions display colored signals to check color recognition.
A few states still use a traditional Snellen wall chart, where you stand 20 feet back and read progressively smaller rows of letters. Either way, you’ll be tested on each eye individually and then both eyes together. If you normally wear glasses or contacts, bring them.
The Acuity Standard You Need to Meet
Visual acuity measures how sharply you can see detail at a distance. Nearly every state requires at least 20/40 corrected vision in your better eye for an unrestricted license. A 20/40 result means that at 20 feet, you can read what someone with textbook-perfect vision reads at 40 feet. That’s less sharp than 20/20, but enough to read road signs and spot hazards at highway speeds.
A handful of states set the minimum slightly lower. Georgia allows 20/60 in at least one eye, and New Jersey and Wyoming set the line at 20/50. If your acuity falls between the unrestricted cutoff and a lower threshold, many states issue a license with restrictions rather than deny you outright. Common restrictions include daylight-only driving or limits on highway use.
Peripheral Vision
Peripheral vision is your ability to detect objects and movement off to the side while looking straight ahead. It matters for lane changes, intersections, and pedestrians. About two-thirds of states set a specific minimum for horizontal visual field. Fifteen states require 140 degrees using both eyes, while others range from 105 to 150 degrees. Alaska, Colorado, and Texas have no formal visual field requirement for non-commercial drivers unless a known vision problem exists.
During the screening, you look straight into the machine while lights flash in your peripheral field, and you press a button or tell the examiner each time you see one. If you have reduced peripheral vision in one eye, some states apply a lower threshold for monocular drivers, often around 70 degrees on the temple side and 35 degrees on the nose side of the functional eye.
Color Vision
Most states do not formally test color vision for a standard driver’s license. Massachusetts is a notable exception, requiring applicants to distinguish red, green, and amber. In practice, colorblind drivers learn traffic signal positions by location rather than color, which is why most states don’t treat color deficiency as a disqualifier for non-commercial driving. Commercial driving is a different story (see below).
Wearing Glasses or Contacts During the Test
You can wear glasses or contact lenses during the screening, and if you need them to hit 20/40, the examiner will have you put them on and retest. Passing with corrective lenses means a restriction code is printed on your license indicating you must wear them whenever you drive. Driving without the required lenses is a traffic violation in every state, treated like driving without a valid license. Depending on the jurisdiction, that can mean a fine, points on your record, or both.
If you’ve had LASIK or another corrective procedure and no longer need glasses, ask your eye doctor for documentation and bring it when you renew. The DMV can remove the restriction after you pass the screening without lenses.
What Happens if You Fail
Failing the screening doesn’t automatically end your driving privileges. The usual sequence goes like this:
- Eye exam referral. The DMV gives you a form, often called a Report of Vision Examination, to take to an optometrist or ophthalmologist. The specialist performs a full clinical exam and fills out the form with your corrected acuity, visual field measurements, and any diagnosis.
- Restricted license. If your corrected vision falls between the unrestricted standard and the absolute minimum, many states issue a license with conditions. Daylight-only driving is the most common. Others include speed limits, geographic radius limits, or a requirement for extra mirrors on the vehicle.
- Denial or revocation. If your vision can’t be corrected to meet even the minimum threshold, the state may deny or revoke your license. This is relatively rare and generally applies only to significant, uncorrectable conditions.
If your license is denied on vision grounds, most states offer some form of review or appeal. The process usually involves submitting detailed documentation from your eye specialist and, in some states, appearing before a medical review board. The specialist’s report carries enormous weight at these hearings, so choosing a doctor experienced with driving-related evaluations makes a real difference.
When You’ll Be Retested
Rules on retesting vary sharply by state. Some states require a vision screening at every renewal regardless of age. Others only test when you renew in person and allow online or mail renewal for most cycles. Alabama, Connecticut, Mississippi, Oklahoma, Pennsylvania, Tennessee, and Vermont don’t require vision proof at routine renewal at all.
Age-Based Retesting
More than half the states impose stricter screening once you reach a certain age, typically by requiring in-person renewal with a mandatory vision test every cycle. The age thresholds vary:
- Age 40: Maryland and Maine. Maine then shifts to every other renewal until age 62.
- Age 50: Oregon, if renewing in person.
- Ages 62 to 65: Maine (every renewal), Georgia, Ohio, South Dakota, and Utah.
- Ages 70 to 75: California, Iowa, and Louisiana at age 70; Indiana, Massachusetts, New Mexico, and Virginia at age 75.
- Ages 79 to 80: Texas and Illinois at age 79; Florida at age 80.
If you’re approaching one of these milestones, get your eyes checked before your renewal date so you aren’t caught off guard by a correctable problem.
Years Between Screenings
States that allow online or mail renewal for the general population often waive the vision test for those cycles, meaning you could go years between screenings. If you notice your vision slipping between renewals, don’t wait for the DMV to catch it. A visit to an optometrist costs far less than an at-fault accident caused by poor vision you already knew about.
Driving With One Eye or Low Vision
Losing vision in one eye doesn’t automatically disqualify you from driving. Every state will issue a non-commercial license to a monocular driver whose remaining eye meets the acuity and, where applicable, visual field standards. Most states expect an adjustment period of about six months after sudden vision loss in one eye before you test. Common restrictions for monocular drivers include outside mirrors on both sides of the vehicle and, in some states, daylight-only driving.
For drivers whose acuity falls below 20/40 but isn’t severe enough to prevent driving entirely, bioptic telescopic lenses can bridge the gap. These are small telescopes mounted in the upper portion of eyeglass lenses. The driver tilts their head down briefly to read a sign or identify a signal, then returns to viewing through the regular lens for general driving. Nearly every state permits bioptic driving, with Iowa and Utah being the primary exceptions.
States that allow bioptics typically attach significant restrictions: daylight-only driving, speed or highway limits, a mandatory road test with the lenses, a maximum telescope power (usually 3x to 4x), and more frequent renewal exams. California, Florida, and Illinois allow you to drive with bioptics but won’t let you use them during the DMV vision screening itself. Your carrier lens must meet the state’s minimum on its own.
Commercial Drivers: A Different Standard
If you drive a commercial motor vehicle, federal standards under 49 CFR 391.41 apply nationwide and are tighter than what your state requires for a regular license. You must have at least 20/40 in each eye individually and 20/40 with both eyes together, with or without correction; at least 70 degrees of horizontal field in each eye; and the ability to recognize standard red, green, and amber traffic signals.
The key difference from non-commercial rules is the “each eye” requirement. A regular license usually turns on your better eye or both eyes together. A CDL requires each eye to independently hit 20/40 and 70 degrees of field, a much higher bar for anyone with unequal vision.
Drivers who can’t meet the standard in their worse eye are not automatically disqualified. Since March 2022, FMCSA’s alternative vision standard under 49 CFR 391.44 replaced the older Federal Vision Exemption Program, and a medical examiner can physically qualify you if you meet the requirements of that section, which include annual evaluation by an eye specialist documented on FMCSA Form MCSA-5871.
Preparing for the Test
If your vision is in good shape, no preparation is really needed. A few practical steps still prevent wasted trips:
- If it’s been more than two years since your last eye exam, schedule one before your DMV appointment. Catching a prescription change ahead of time is easier than failing the screening and coming back.
- Bring your current glasses or contacts. DMV workers report this as one of the most common reasons for failed screenings. If you wear contacts, make sure they’re fresh.
- Bring a backup pair if you have one. If your primary glasses are lost, broken, or outdated, the DMV won’t lend you anything.
- Check your state’s standards. If you’re borderline, knowing the acuity cutoff and whether your state tests peripheral vision helps you and your eye doctor prepare. Your state DMV website will list the specifics.
If you already know you have a condition affecting your vision, bring documentation from your eye specialist. A completed vision report in hand can sometimes let you skip the in-office screening or speed things up if you fail the initial test.