Nearly every state sets the visual acuity standards for a driver’s license at 20/40 or better in at least one eye, meaning you need to see at 20 feet what someone with normal vision sees at 40 feet. Fall below that line and you may still qualify for a restricted license, with cutoffs that range from 20/50 down to 20/100 depending on the state. Below the state’s absolute floor, the license is denied until a professional eye exam says otherwise.
The Two Measurements That Matter
Two numbers decide whether your eyesight qualifies you to drive, and both are checked at the counter.
Visual acuity measures the sharpness of your central vision. 20/40 is the near-universal threshold for an unrestricted standard license. States that offer tiered licensing issue restricted licenses to drivers whose acuity falls between the unrestricted standard and the state’s absolute cutoff, which varies from 20/50 to 20/100.
Peripheral vision measures how wide your visual field extends while your eyes look straight ahead. Most states require between 100 and 140 degrees of horizontal field measured with both eyes. Drivers with sight in only one eye face a lower threshold, often around 70 degrees on the temporal side. The reason this matters is practical: lane changes, intersections, and merging traffic all depend on noticing things outside your direct line of sight. A driver whose peripheral field falls short of the state’s minimum may still qualify for a license on the condition that the vehicle carries outside mirrors on both sides.
What the DMV Vision Screening Actually Tests
The screening happens when you first apply and again at renewal. Renewal periods run from four to ten years depending on the state, and most states require a vision test at every in-person renewal.1National Highway Traffic Safety Administration. Countermeasures That Work – Older Drivers – In-Person Renewal and Vision Test
The test takes about a minute. You look into a device on the counter that displays rows of letters or symbols at simulated distances, and a clerk asks you to read a specific line with both eyes open, then sometimes with each eye on its own. If you wear glasses or contact lenses, keep them on. Passing with corrective lenses means your license will carry a restriction requiring you to wear them while driving, but you’ll walk out with a valid license that day.
The screening is a quick filter, not a diagnosis. It catches drivers who clearly can’t meet the baseline, but it won’t pick up most eye diseases or subtle field-of-vision losses. Those are the job of the professional exam that comes next if you fail.
Many states also tighten the testing frequency as drivers age. The trigger age varies widely between states, with some beginning age-based vision testing at every renewal as early as 40 and others not imposing it until 80 or not at all.2Insurance Institute for Highway Safety. Older Drivers: License Renewal Procedures A driver who passed every screening for decades can eventually fail one as cataracts, macular degeneration, or glaucoma progress.
What Happens If You Fail the Screening
Failing the DMV’s vision test doesn’t end the process. The clerk hands you a form, often called a Report of Vision Examination or something similar, and sends you to an eye care professional. Before deciding next steps, the agency weighs several factors: whether the problem affects one eye or both, whether corrective lenses can fix it, and whether the condition is stable or likely to worsen.
In many cases, the fix is simple. If your glasses prescription is out of date, get a comprehensive eye exam, pick up new lenses, and return to the DMV wearing them with the signed form from your eye doctor. The DMV retests your vision at that second visit, and some states also require a road test to confirm you can drive safely with your corrected vision.
If the exam reveals a condition that lenses can’t fully fix, the outcome depends on how far your vision sits below the state standard. You might receive a restricted license with conditions attached, or you might be denied. Denial isn’t necessarily permanent, and most states offer a path to reconsideration.
The Professional Eye Exam
When the DMV refers you out, an optometrist or ophthalmologist performs a comprehensive exam and completes the agency’s form. The practitioner records your current acuity and field-of-vision measurements, describes the specific condition, states whether it’s stable or progressive, and gives a recommendation on driving privileges and any conditions that should apply.
Keep an eye on timing. For standard licenses, most states require the completed form to be recent, though the exact window varies. For commercial licenses, the federal rule is strict: the medical examiner must receive the completed Vision Evaluation Report within 45 calendar days of the ophthalmologist or optometrist signing it.3Federal Motor Carrier Safety Administration. Vision Evaluation Report, Form MCSA-5871
If the specialist identifies a progressive condition like glaucoma or macular degeneration, the licensing agency will likely require periodic re-examinations, often annually, with updated documentation each time to keep your license active.
A comprehensive eye exam for DMV purposes runs roughly $50 to $250 out of pocket without insurance, and ophthalmologists generally charge more than optometrists. Vision insurance may cover most or all of the cost, but confirm your plan treats a DMV-required exam as a covered service before assuming it does.
Common Vision Restrictions on a License
Drivers who meet the state’s minimum but fall short of the unrestricted threshold receive a license with conditions printed on the card. These are legally binding, and law enforcement checks for them during traffic stops.
- Corrective lenses required. The most common restriction. You must wear glasses or contacts every time you drive. Driving without them is treated as a traffic violation in every state, with penalties ranging from a fine to a misdemeanor charge depending on where you are.
- Daylight driving only. Imposed when night vision is inadequate, often due to retinitis pigmentosa or advanced cataracts. Driving between sunset and sunrise is prohibited.
- Outside mirrors required. Drivers with reduced peripheral vision may be required to have both left and right outside rearview mirrors installed to compensate for a narrower visual field.
- Geographic or speed restrictions. Less common, but some states limit drivers with borderline vision to roads within a certain radius of home or below a certain speed limit.
Restriction codes appear as letters or numbers on your physical license, and the specific coding system varies by state. Violating any of them can result in a citation, fines, or suspension, and in some states, driving without required corrective lenses carries the same legal weight as driving without a valid license.
Commercial Driver Standards Are Stricter
If you drive commercially, the standard-license numbers above don’t fully apply. CDL applicants must meet federal vision standards set by the Federal Motor Carrier Safety Administration: 20/40 acuity in each eye individually, 20/40 binocular acuity, at least 70 degrees of horizontal field in each eye, and the ability to recognize standard red, green, and amber traffic signal colors.4eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers The CDL standard applies to each eye separately, not just the better one.
A CDL driver who can’t meet the standard with their worse eye falls under an alternative vision standard that took effect in March 2022.5Federal Motor Carrier Safety Administration. General Vision Exemption Package That driver must have at least 20/40 acuity and 70 degrees of horizontal field in the better eye, show a stable vision deficiency, and demonstrate enough time has passed to adapt.6Federal Motor Carrier Safety Administration. FMCSA Form MCSA-5871 Drivers certified under this alternative standard receive a medical certificate valid for one year, not the usual two, meaning annual re-examination with a fresh Vision Evaluation Report.
Bioptic Lenses and Post-Surgery Vision
Bioptic telescopic lenses are small telescopes mounted on glasses that let a driver with low vision briefly magnify road signs and distant objects. Around 37 states permit some form of bioptic driving, but the rules vary enormously; some set clear vision, training, and monitoring requirements, others allow it without defining standards, and a few prohibit it outright. Where it is permitted, common conditions include a minimum acuity through the telescope (often 20/40), a wider-than-usual peripheral field through the carrier lenses, and daylight-only driving during the first year.
Eye surgery doesn’t automatically change your license, but it often changes what restrictions belong on it. After LASIK or cataract surgery, you still need to meet the same 20/40 standard. If you previously had a corrective-lenses restriction and now meet the standard unaided, you can have that restriction removed by passing a new vision screening. There is no universal waiting period after surgery; your surgeon decides when your vision has stabilized enough to drive, and the DMV only cares whether you meet the acuity standard on the day of the test. If surgery corrected one eye but not the other, you may now be evaluated under monocular-vision rules rather than binocular ones, which can change the restrictions that apply.
Appealing a Vision-Based Denial
A denial or suspension based on vision is not the final word. Most states have a medical review process that lets you challenge the decision by submitting additional or updated documentation from your eye care provider. Some states convene a Medical Advisory Board of physicians who review your records and recommend an outcome to the licensing agency.7National Highway Traffic Safety Administration. Medical Review Practices for Driver Licensing
If the board upholds the denial, you can usually appeal to a court. Hearings tend to run 15 to 20 minutes, and you can bring witnesses, test results, and reports from your own physicians.7National Highway Traffic Safety Administration. Medical Review Practices for Driver Licensing A Certified Driver Rehabilitation Specialist can perform a behind-the-wheel evaluation, which some agencies accept as evidence that you can drive safely even without meeting the standard screening thresholds. If your vision improves after surgery or treatment, you can submit updated documentation and request reconsideration at any time, though a state that fully revokes a license may require a waiting period (often 30 days) and a reapplication that starts from a learner’s permit with all tests repeated.