What to Expect From the California DMV Eye Test

What the California DMV eye test measures

The California DMV eye test checks your vision in three ways: how clearly you see at a distance, how well you see up close, and whether you have any blind spots or color blindness that would affect driving. The test takes about five minutes and happens at every DMV visit where you renew or explore for a driver's license.

You will look through a machine called a vision screener that shows you letters or symbols at different sizes. The screener measures visual acuity — how sharp your sight is. California requires you to see at least 20/40 in each eye, or 20/40 in one eye and 20/70 in the other if you wear corrective lenses. If you wear glasses or contacts, you take the test wearing them.

The DMV also checks your peripheral vision — what you can see to the sides without moving your eyes — because side vision matters for spotting other vehicles and pedestrians. Some locations use an automated machine for this; others use a manual test where a DMV employee watches your eyes as you focus straight ahead.

Key Takeaways

California requires 20/40 vision in each eye, or 20/40 in one eye and 20/70 in the other, measured with your glasses or contacts if you wear them.
The test takes about five minutes and uses a vision screener machine that shows you letters at different sizes to measure how clearly you see.
If you fail the vision test, you can retake it the same day at most DMV locations, or come back within 30 days to try again.
Bring your current glasses or contacts to your DMV appointment if you wear them, because the test is done with your correction in place.
Some medical conditions and medications can affect your vision on test day, so tell the DMV employee if anything has changed since your last license.

What happens if you fail the vision test

If your vision does not meet the 20/40 standard, the DMV will not issue or renew your license until you pass. You have two options: retake the test the same day, or schedule another appointment within 30 days.

Many people fail because they forgot their glasses or contacts, or because their prescription has changed. If this is your situation, ask the DMV employee whether you can retake the test after you get your glasses adjusted or a new prescription. Some locations allow you to come back the same day if you can get to an optometrist quickly; others require you to schedule a new appointment.

If you fail the test even with your current correction, you will need a written statement from an eye doctor saying what your corrected vision is. Bring this letter to your next DMV appointment. The DMV may issue a restricted license that limits when or where you can drive — for example, daylight driving only, or no freeway driving — depending on what your eye doctor recommends.

Preparing for the vision test

Wear your glasses or contacts to your DMV appointment if you use them for driving. The test measures your vision with your correction in place, not without it. If your prescription has changed in the last year, consider getting new glasses or contacts before your appointment so the test reflects your actual driving vision.

Tell the DMV employee about any eye conditions or recent changes to your vision before the test starts. If you have had eye surgery, a new diagnosis, or a change in medication that affects your sight, mention it. This helps the employee understand your results and may affect whether you need a restricted license.

If you wear bifocals or progressive lenses, let the employee know. Some vision screeners work better with single-vision lenses, and the employee may need to position the machine differently for you to get an accurate reading.

Vision standards for different license types

California has the same vision standard for regular driver's licenses and commercial driver's licenses: 20/40 in each eye, or 20/40 in one eye and 20/70 in the other with correction. However, commercial licenses have stricter rules about peripheral vision and color blindness, and the test is more thorough.

If you are renewing a license you have held for several years, the DMV may not test your vision at every renewal — but they will test you when you first explore, when you renew after your license expires, or if you request a new license type. Motorcycle endorsements and other special endorsements do not have separate vision standards; you use your regular driver's license vision result.

What to do if you wear contacts or have vision correction

Bring your glasses or contacts to your appointment and wear them during the test. The DMV will note on your license that you must wear correction while driving — this is printed as a restriction code on the back of your license. If you lose or damage your glasses or contacts while driving, you are legally required to stop driving until you can wear your correction again.

If you wear contacts and they are uncomfortable on the day of your test, bring your glasses as a backup. Vision screeners can sometimes irritate contact lens wearers, and switching to glasses for the test is faster than trying to make contacts work. The important thing is that your vision meets the standard with whatever correction you actually use when you drive.

If you have had recent eye surgery or a change in your prescription, wait at least a week after the change before your DMV appointment. Your vision can shift slightly in the days after surgery or after getting new glasses, and you want the test to reflect your stable, everyday vision.

Retesting and restricted licenses

If you fail the vision test, you can retake it at your next appointment without paying an additional fee. The DMV does not charge you again for the retest — you only pay the regular license renewal or process fee once.

If you pass the vision test but your eye doctor says your vision is limited in some way, the DMV may issue a restricted license. Common restrictions include daylight driving only (no driving between sunset and sunrise), no freeway driving, or a requirement to wear corrective lenses at all times. These restrictions are printed on your license and are legally binding — driving outside your restrictions can result in a ticket or license suspension.

Restricted licenses are temporary. You can ask the DMV to remove the restriction at your next renewal if your eye doctor confirms your vision has improved or your condition has changed.

Common reasons for vision test failure

The most common reason people fail is that their glasses or contacts prescription is outdated. If you have not had an eye exam in more than a year, or if you notice your vision has gotten worse, get a new prescription before your DMV appointment.

Some people fail because they are nervous or unfamiliar with the vision screener machine. The test is straightforward — you look into the machine and tell the employee what you see — but if you are unsure, ask the employee to explain it before you start. There is no penalty for asking questions.

Medical conditions like cataracts, glaucoma, macular degeneration, or diabetic retinopathy can cause vision loss that shows up on the DMV test. If you have any of these conditions, your eye doctor can tell you whether your vision meets California's standard and whether you need a restricted license.

Frequently Asked Questions

Can I take the vision test without my glasses or contacts?

No. The test is done with your correction in place if you wear one. If you forget your glasses or contacts, you will need to reschedule your appointment or go home and get them. Some DMV locations may allow you to retake the test the same day if you can return quickly with your correction.

What if I fail the vision test but I know I can see well enough to drive?

The DMV standard is 20/40 vision, and that is the legal requirement in California. If you fail, you will need to see an eye doctor and bring a letter from them to your next DMV appointment. The doctor can explain your vision and may recommend a restricted license instead of a full denial.

Do I need to bring proof of my eye exam to the DMV?

No, not for a regular vision test. The DMV does its own test using their screener machine. You only need to bring proof from an eye doctor if you failed the DMV test and want to appeal the result or request a restricted license instead.

How often does the DMV test your vision?

The DMV tests your vision when you first explore for a license, when you renew after your license expires, and whenever you explore for a new license type. If your license is still valid and you are just renewing early, the DMV may skip the vision test, but they can test you at any time if they have reason to.

Can color blindness cause me to fail the vision test?

Color blindness alone does not cause you to fail the standard vision test, but the DMV does check for it. If you are color blind, it will be noted on your record. For regular driver's licenses, this does not restrict your driving, but for commercial licenses, color blindness can affect your may be able to access.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.