To get a standard driver’s license in nearly every state, you need corrected visual acuity of at least 20/40 in your better eye and a horizontal field of vision somewhere between 110 and 140 degrees. Those are the two numbers that decide whether you walk out with an unrestricted license, a license with conditions, or a referral to an eye doctor. The vision requirements for a driver’s license also include a floor below which no license will be issued at all, and a separate, stricter set of standards for commercial drivers.
The 20/40 Acuity Standard
The vast majority of states set the acuity bar at 20/40 in the better eye, with or without corrective lenses. A few deviate, using 20/50 or 20/60 as the unrestricted threshold instead.1American Medical Association. Legal Vision Requirements for Drivers in the United States In practical terms, 20/40 means you can read at 20 feet what someone with textbook vision reads at 40 feet, which is roughly the sharpness needed to read a standard road sign at the distance you’d need to react to it.
If you hit 20/40 without glasses or contacts, you qualify for an unrestricted license. If you only reach it with corrective lenses, you still pass, but your license will carry a corrective lenses restriction.
Below the passing line there is also an absolute floor. Some states refuse to issue any license once corrected acuity in the better eye drops below 20/70, others draw the line at 20/100, and a few will review applicants down to 20/200 under special programs. If your corrected vision falls under your state’s absolute cutoff, no standard license is available, and your only remaining route is a bioptic telescopic lens program if your state offers one.
Peripheral Vision Minimums
Acuity measures how sharply you see straight ahead. Peripheral field measures how much you see to the sides, and states set minimums for that too. Most require a horizontal field between 110 and 140 degrees for drivers using both eyes. Some states accept as little as 55 degrees in one eye when the combined binocular field meets a separate minimum, while others require at least 150 degrees binocularly.
Drivers with vision in only one eye face a different rule. Losing an eye eliminates roughly half the peripheral field on that side, so most states apply a wider single-eye threshold, often around 70 degrees temporal in the working eye. Some states also require additional side-view mirrors as a condition of licensing a monocular driver.
What the Vision Screening at the DMV Involves
The in-office screening is quick. You look into a boxlike vision machine, often a Titmus or Optec screener, and read rows of letters that get progressively smaller. A few offices still use a wall-mounted Snellen chart. The technician asks you to read with both eyes open first, then covers each eye in turn, so a significant imbalance between your eyes shows up even if you’ve never noticed it in daily life. Results are entered electronically into your record on the spot.
Peripheral vision is tested with small lights that flash at the edges of the viewer. You signal when you see one appear in your far left or right field without turning your head. The whole process takes under five minutes, and you’ll know immediately whether you passed outright, need corrective lenses noted on your license, or need to see a specialist.
What About Color Vision?
Standard passenger-vehicle screenings in most states do not include a formal color blindness test. A handful of states check whether you can distinguish red, green, and amber signal colors, but color blindness alone rarely disqualifies anyone from a regular license. Traffic signals are built with position cues, red on top and green on bottom, that compensate for color deficiency. Commercial licensing treats this differently.
Restrictions When You Only Partly Pass
When your eyesight meets the minimum only with help, the licensing agency attaches coded restrictions to your record. These appear as letter codes on the card, and violating them is a traffic offense.
Corrective Lenses
The most common restriction, often coded as Restriction B, requires you to wear glasses or contact lenses whenever you drive. Getting pulled over without them can result in a citation, and repeat violations may bring points or suspension. Fines are generally comparable to other equipment-related traffic infractions.
Daylight Driving Only
If your acuity sits in a borderline range, many states will issue a license good only during daylight hours. A corrected acuity between roughly 20/40 and 20/70 commonly triggers this restriction in states that use it. Some states pair the daylight limit with a speed cap or a ban on interstate driving. Driving at night under this restriction carries the same consequences as driving without required glasses.
Additional Mirrors
Drivers with reduced peripheral vision, particularly monocular drivers, may be required to install extra side-view mirrors to cover the resulting blind zone. The requirement is printed on the license and enforceable at a traffic stop.
Removing a Corrective Lenses Restriction After LASIK
If LASIK, PRK, or another procedure has brought your uncorrected vision up to the unrestricted standard, you can have the restriction removed. The usual route is to pass a new in-office vision screening without wearing glasses or contacts, or to submit documentation from your eye care provider confirming your current uncorrected acuity. Some states accept electronic submission from the provider; others want you to take the test in person. You’ll typically pay a small fee for a replacement card.
When You Fail the Screening
If you can’t pass the in-office test, the agency sends you to a licensed optometrist or ophthalmologist for a full clinical evaluation. The specialist completes a state form showing your exact Snellen rating for near and distance vision, your peripheral field measurements, and any diagnosis that affects driving safety. They also give a clinical opinion on whether you can safely drive and whether your condition is stable or likely to worsen before your next renewal. Progressive conditions like glaucoma, cataracts, and macular degeneration draw particular attention.
These evaluation forms have an expiration window, usually six months to one year from the exam date. Submit it too late and you’ll need a fresh exam. Straightforward cases are often resolved the same day you bring the form in. Borderline or progressive cases get routed to a medical review unit, which may take several weeks and may ultimately require a behind-the-wheel test to show you can compensate for the limitation.
Bioptic Telescopic Lenses for Low Vision
Bioptic telescopic lenses are small telescopes mounted in the upper portion of eyeglasses. You look through the regular carrier lens most of the time and tilt your gaze upward briefly to use the telescope for reading signs or spotting distant hazards. Roughly 45 states permit bioptic driving for people whose carrier-lens acuity falls below the standard threshold but whose telescopic acuity is high enough to qualify.2National Institutes of Health. Current Perspectives of Bioptic Driving in Low Vision
Rules vary, but most states require carrier-lens acuity no worse than 20/200 and telescopic acuity of 20/40 to 20/60. Many mandate specialized training, including classroom hours and behind-the-wheel instruction built for bioptic users. A few states prohibit bioptics entirely, so a call to your licensing agency before investing in the lenses is worth the time.
Commercial Driver Vision Standards
Commercial driver’s licenses carry a stricter set of standards set by federal rule. You need 20/40 in each eye individually, 20/40 with both eyes together, a horizontal field of at least 70 degrees in each eye, and the ability to recognize red, green, and amber traffic signal colors.3eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers The key difference from a standard license is that each eye independently has to hit 20/40, not just the better one.
Color recognition is enforced here. A commercial applicant who can’t reliably distinguish signal colors won’t pass the physical qualification exam, though color blindness itself isn’t automatically disqualifying if the driver can identify signals by brightness and position during testing.
Drivers with vision in only one eye once had to apply for a federal exemption from FMCSA, a process that could take months. A final rule effective March 2022 replaced that program with an alternative pathway: the driver’s eye specialist completes a Vision Evaluation Report (Form MCSA-5871) dated within 45 days of the physical exam, and a certified medical examiner uses it to issue a medical certificate valid for up to one year.4Federal Motor Carrier Safety Administration. Vision Standard Final Rule Announcement Monocular commercial drivers recertify annually under this process rather than every two years.
Vision Retesting for Older Drivers
Age-related vision changes are the main reason states build retesting into renewal. According to NHTSA, 19 states require more frequent vision screenings at renewal once a driver passes a specified age, typically 65 or 70.5NHTSA. In-Person Renewal and Vision Test Several states also shorten the renewal interval itself for older drivers, and a number prohibit online or mail-in renewal past a certain age, which forces an in-person vision check.
If you’re approaching one of these age thresholds, see your eye care provider before your renewal date. Catching a correctable problem early, whether it’s a new prescription or an emerging cataract, is far less disruptive than failing the screening and getting referred into a medical review process.