To get or renew a driver’s license in nearly every state, you’ll take a short driver’s vision test that checks whether you can see well enough to drive safely. The standard almost everywhere is 20/40 visual acuity in your better eye, plus a minimum horizontal field of peripheral vision. The screening takes about five minutes. If you wear glasses or contacts, bring them: that single detail is the most common reason people pass or fail.
What the Test Measures
The main measurement is distance acuity, written as a Snellen fraction like 20/40. That means you can read at 20 feet what someone with unimpaired vision reads at 40. It’s not a demanding standard; 20/40 is roughly the acuity needed to read road signs and spot hazards at highway speeds. If you can’t hit 20/40 with both eyes open, the examiner will test each eye separately to see whether one eye is doing the work.
Peripheral vision is the second component. Most states require somewhere between 110 and 140 degrees of horizontal field across both eyes. Merging traffic, cyclists, and pedestrians usually enter your field from the side, so this part of the test matters as much as the letters on the chart.
Color vision is not a barrier for a standard passenger license. Color blindness does not disqualify you in any state, because traffic signals use positional cues (red on top, green on bottom) that color-blind drivers rely on every day. Commercial licensing is different, which is covered below.
How the Screening Is Run
Licensing offices use one of two setups. Some have a traditional Snellen wall chart: you stand at a marked line about 20 feet back and read progressively smaller rows of letters. Others use a machine-based viewer, sometimes called a Titmus tester, that you lean into. The machine simulates distance viewing in a small footprint and can check acuity and peripheral vision in the same device.
For acuity, the examiner asks you to read the row of letters at the 20/40 line. Get them right and you pass. For peripheral vision, small lights flash at the edges of the viewing field and you indicate which side you saw them on without moving your head. The examiner logs the result digitally, and that result decides whether your license application moves forward or you leave with a referral.
When You’ll Be Tested
Every state screens vision when you first apply for a license. After that, the rules diverge. Many states require a screening at every in-person renewal, while others let you renew by mail or online with no vision check. More than half the states tighten the rules once you reach a certain age, typically 65 or 70, by requiring in-person renewal with a mandatory screening each cycle. The age thresholds vary: some states start additional screening as early as 64 or 65, others not until 75 or 80. A handful screen every driver at every renewal regardless of age.
If you aren’t sure what applies to you, check your renewal notice. It will tell you whether an in-person visit with a vision screening is required this time.
How to Prepare
Bring your glasses or contacts. People forget, and the examiner won’t reschedule because your glasses are at home. If you pass while wearing corrective lenses, a restriction code goes on your license requiring you to wear them when driving. That restriction stays on your record until you demonstrate you can pass without them.
Make sure your prescription is current. An outdated prescription or scratched, smudged lenses can leave you just below the 20/40 line. If your last eye exam was more than a year ago, consider scheduling one before you head to the licensing office. It’s cheaper to catch a prescription change at the optometrist than to fail the DMV screening and scramble to fix it.
You can also have a private eye doctor handle the vision certification instead of taking the in-office screening. Download your state’s Report of Vision Examination form from the motor vehicle department, have your eye doctor complete it after an exam, and submit the signed form with your application. These forms usually must be dated within the last six months to be accepted. With one in hand, the licensing agent skips the screening.
A small but growing number of states accept online vision tests through approved telehealth providers for license renewals. These providers may charge a separate fee, and depending on the platform you may need to submit the results to the licensing agency yourself. Online testing isn’t available everywhere and typically applies only to renewals, not first-time applications.
If You Fail the Screening
Failing the in-office test doesn’t mean you can’t drive. It means you need a professional evaluation. The licensing office hands you a vision report form and refers you to a licensed optometrist or ophthalmologist for a full exam. The specialist checks your acuity, peripheral field, and overall eye health, then fills out the form with findings and a recommendation about whether you can drive safely.
If corrective lenses bring you to 20/40 or better, the specialist notes that on the form, you get the right prescription, and you return to the licensing office with documentation to finish your application. If you can’t be corrected to the minimum standard, you face either a restricted license with meaningful limitations or a denial of driving privileges. The specialist’s recommendation carries weight, and the licensing agency will follow it.
The conditions behind most failures are progressive and often go unnoticed until the screening catches them:
- Cataracts cloud the eye’s natural lens, blur vision, and wash out colors. They are the most common reason older drivers fail, and they are surgically treatable. Many people pass easily after cataract surgery.
- Glaucoma damages the optic nerve and eats away at peripheral vision first. You might still read the 20/40 line while having dangerously narrow side vision, which is why the peripheral field test exists.
- Macular degeneration destroys central vision while peripheral vision stays intact. Advanced cases struggle with the acuity portion.
- Diabetic retinopathy damages blood vessels in the retina, and vision can fluctuate day to day.
If you have any of these conditions, don’t wait for the licensing office to discover the problem. A comprehensive eye exam before your renewal date leaves time to explore treatment, update your prescription, or start a low-vision evaluation if you need one.
Restricted Licenses
When your vision falls in a gray zone — safe enough to drive under certain conditions but not safe enough for an unrestricted license — the agency issues a restricted license. The most common restriction is a corrective lens requirement. Others include:
- Daylight driving only, for drivers with poor night vision or early-stage cataracts that worsen in low light.
- Speed or road restrictions limiting you to lower-speed roads or prohibiting highway driving.
- Geographic restrictions confining your driving to a certain radius from home.
- An outside mirror requirement for drivers with limited vision in one eye.
Violating a license restriction is a traffic offense in every state, though the consequences vary. Some states treat driving without required corrective lenses as a minor moving violation with a fine. Others treat it as equivalent to driving without a valid license, with points, higher fines, or misdemeanor charges. These restrictions aren’t suggestions.
Bioptic Telescopic Lenses
Drivers with low vision who can’t reach 20/40 with standard glasses may qualify to use bioptic telescopic lenses: small telescopes mounted in the upper portion of eyeglass lenses that provide two to four times magnification. Nearly all states (48 out of 50, plus Washington, D.C.) allow bioptic driving in some form, though the specific acuity thresholds and training requirements vary.
Getting licensed with bioptics isn’t as simple as buying the device. Most states require a structured process starting with a low-vision evaluation, moving through device fitting and stationary practice, and ending with several weeks of behind-the-wheel training. The telescope is used briefly, roughly 10 to 15 percent of driving time, to read signs or identify distant objects, while the regular carrier lens handles the rest. After training, you take the standard road test wearing the bioptics.
Removing a Restriction After Surgery
If you’ve had LASIK or another refractive surgery and no longer need glasses, you can get the corrective lens restriction removed. Visit the licensing office, retake the vision screening without glasses, and if you pass at 20/40 or better, the restriction comes off. Don’t skip this step. If your license still shows a corrective lens restriction and you’re pulled over without glasses, you can be cited for a restriction violation even though your uncorrected vision is fine.
Commercial Drivers Face a Different Standard
If you’re applying for a commercial driver’s license, the requirements above don’t fully apply. Federal rules set by the Federal Motor Carrier Safety Administration require at least 20/40 acuity in each eye individually (not just the better eye), a field of vision of at least 70 degrees in each eye’s horizontal meridian, and the ability to recognize standard red, green, and amber traffic signal colors. The color recognition requirement is the key difference from a regular license. A commercial driver who can’t distinguish signal colors can’t hold a CDL.
Commercial drivers with monocular vision or reduced acuity in one eye used to need a federal vision exemption. Since March 2022, a medical examiner can qualify them directly using a Vision Evaluation Report (Form MCSA-5871), without a separate federal exemption application.