Yes, you can drive with 20/40 vision in nearly every state. That number is the minimum visual acuity almost every U.S. licensing agency accepts for a standard, unrestricted driver’s license. If your eyes reach 20/40 on their own, you get a regular license. If you only hit 20/40 while wearing glasses or contacts, you still get a license, but it will carry a corrective-lens restriction requiring you to wear them whenever you drive.
What 20/40 Vision Means
Visual acuity is measured on the Snellen chart, the poster with rows of shrinking letters. “20/40” means you have to stand 20 feet from the chart to read a line that a person with textbook-normal 20/20 vision could read from 40 feet. It is not a severe impairment. Most people with 20/40 vision function well day to day, though highway signs and small print will look softer than they would to someone with sharper eyes.
The larger the second number, the weaker the acuity. So 20/60 is worse than 20/40, and 20/200 — the threshold for legal blindness — is far worse still. The line most states have drawn between “drive without conditions” and “drive with restrictions or not at all” sits right at 20/40.
The State Standard for a Regular License
Almost every state requires best-corrected visual acuity of at least 20/40 in the better eye for a standard driver’s license. “Best-corrected” is the important phrase. It means the state cares whether your vision reaches 20/40 with whatever correction you normally wear, not whether your bare eyes get there on their own. Glasses and contacts count.
Some states build in flexibility around the edges. A few will license a driver whose better eye reads 20/40 while the weaker eye reads as low as 20/70. Others issue restricted licenses when corrected acuity lands between 20/41 and 20/70. The specifics vary state to state, so a quick look at your own DMV’s website before a renewal is worth the time.
The Corrective Lens Restriction
If you pass the vision screening only while wearing glasses or contacts, your license will carry a corrective-lens restriction. The format differs — some states print “CORRECTIVE LENSES” on the back of the card, others use a letter or number code — but the effect is the same everywhere. You must wear your glasses or contacts any time you drive.
This is the most common vision-related restriction on American licenses, and it has teeth. Driving without your required correction is a traffic citation in every state. Penalties range from a modest fine to a misdemeanor with potential jail time, depending on where you are. If you are in a crash without your lenses on, the other driver’s insurer has a ready-made negligence argument, and fault can shift toward you.
Had LASIK or another procedure that cleared up your vision? Get the restriction removed at the DMV before you drive again without your glasses. Until the state updates the record, the condition on your license still applies to you.
Commercial Driving Is Stricter
If you drive a commercial motor vehicle, 20/40 in your better eye is not enough on its own. Federal rules require distant visual acuity of at least 20/40 in each eye individually, plus 20/40 with both eyes together, with or without correction. Commercial drivers also need a horizontal field of vision of at least 70 degrees in each eye and the ability to recognize standard red, green, and amber traffic signals.1eCFR. 49 CFR 391.41 – Physical Qualifications for Drivers
The difference matters in practice. A driver with 20/40 in one eye and 20/70 in the other may qualify for a regular license in many states but will not clear the standard federal commercial threshold. Drivers who cannot meet the standard in the weaker eye may still qualify under an alternative vision standard, evaluated through a medical examiner rather than a separate application.2FMCSA. General Vision Exemption Package
If Your Vision Falls Below 20/40
Most states will not issue a standard license when corrected vision cannot reach 20/40. That does not automatically mean losing the ability to drive. Several options exist depending on how far below the threshold you land and where you live.
Daylight-only licenses are the most common middle ground. When corrected acuity falls somewhere between roughly 20/41 and 20/70, many states issue a license that limits you to daytime driving. Dusk, nighttime, and heavy weather are off the table. The idea is straightforward: vision that works in good light is not reliable when the light drops.
Bioptic telescopic lenses are the other main path. Around 43 states allow drivers with weaker acuity to use miniature telescopes mounted on their eyeglasses. You look through the regular lens most of the time and briefly tilt your head to use the telescope for reading signs or spotting distant objects. Many bioptic states require specialized behind-the-wheel training before issuing this kind of license, and some require as many as 30 hours of instruction. Additional restrictions like no highway or no nighttime driving often come attached.
A small number of states also impose geographic or speed-limit restrictions on certain visually impaired drivers, keeping them on lower-speed roads or within a defined radius of home. Any of these conditions will appear on your license, and violating one carries the same consequences as driving without required corrective lenses.
The DMV Vision Screening
The screening at your licensing office is quick. You look into a testing device and read letters or numbers at a simulated distance while wearing whatever correction you normally use. The screener checks whether you meet the state’s 20/40 threshold. Many states also test peripheral vision using small lights that appear at the edges of your field while you focus straight ahead, and some states check color perception.
Failing the screening does not end your driving eligibility. The typical next step is a referral to an optometrist or ophthalmologist who performs a full examination and fills out a state-specific vision report. You submit the completed form back to the DMV.
What happens next depends on the results. If corrective lenses bring you to 20/40, you generally get a license with the corrective-lens restriction added. If your corrected vision falls in the 20/41 to 20/70 range, the state may issue a restricted license with conditions like daylight-only driving. If your vision cannot be corrected enough to drive safely, the license will be denied. Some states also schedule a behind-the-wheel evaluation to see whether you can compensate for your specific limitation in real traffic. Bring your glasses, contacts, and any specialized equipment to both the exam and the road test.
Older Drivers and Renewal
Vision changes as you age, and many states account for that at renewal. The trigger age and cycle vary considerably. Some states start requiring in-person renewal with a vision screening as early as 63 or 65, while others wait until 70, 75, or 80. Several also shorten the renewal cycle for older drivers, moving from an eight-year cycle down to every four, three, or two years, which produces more frequent vision checks.3National Highway Traffic Safety Administration. Key Provisions of State Laws Pertaining to Older Driver Licensing Requirements A handful of states add a road skills test above a certain age.
The point is not to force older drivers off the road but to catch vision changes early so they can be corrected or accommodated with a restriction. If you are close to the age threshold in your state, book an eye exam a few weeks before your renewal date. Walking into the DMV with an up-to-date prescription is the simplest way to keep your license clean and avoid a second trip.