What the Texas vision test measures
The vision test for your Texas driver's license checks whether you can see well enough to drive safely on public roads. The Department of Public Safety (DPS) administers this test at every licensing office, and it takes about two minutes. You will read letters or numbers on a chart from a set distance — usually 20 feet — and the examiner records whether you meet the minimum standard of 20/40 vision in at least one eye.
The test does not check color blindness, depth perception, or peripheral vision, though some of those abilities matter for safe driving. It is a basic screening, not a comprehensive eye exam. If you wear glasses or contacts, you must wear them during the test — the examiner will note on your license whether correction is required.
Key Takeaways
- Texas requires you to see 20/40 or better in at least one eye; if you cannot, you will not pass the vision portion and cannot receive your license.
- You must wear your glasses or contacts during the test if you normally wear them while driving, and the examiner will mark your license accordingly.
- If you fail the vision test, you can retake it the same day at most DPS offices, but you may want to see an eye doctor first to understand why you failed.
- The vision test is separate from the written knowledge test and the driving test; failing vision does not let you move forward to either of those.
The 20/40 standard and what it means
The 20/40 standard means you can see at 20 feet what a person with typical vision sees at 40 feet. It is lower than the 20/20 standard most people think of as "normal" vision, but Texas law sets 20/40 as the minimum safe threshold for driving. If your vision is worse than 20/40 in both eyes, you do not meet the requirement.
If you have vision in only one eye, Texas still allows you to drive, but you must pass the 20/40 test in that eye. The examiner will test each eye separately and record the results on your license. Some people find they see better in one eye than the other and still pass overall.
What happens if you wear glasses or contacts
If you wear glasses or contacts to see clearly, you must wear them during the vision test. Tell the examiner before the test begins that you are wearing correction. The examiner will note on your license that you must wear correction while driving — this is a legal requirement, not just a recommendation.
If you wear bifocals or progressive lenses, wear the pair you normally use while driving. If you wear contacts, bring them in and wear them during the test. If you have recently changed your prescription or are unsure whether your current glasses are strong enough, consider visiting an eye doctor before your DPS appointment. An eye doctor can tell you whether your vision meets the 20/40 standard and can provide documentation if you fail the DPS test.
Failing the vision test and what to do next
If you do not pass the vision test, you cannot move forward to the written test or driving test that day. Most DPS offices allow you to retake the vision test when ready, sometimes for a small fee. However, failing twice in one visit usually means you must return on a different day.
If you fail, the first step is to understand why. Visit an eye doctor and ask them to test your vision against the 20/40 standard. They can tell you whether you need a new prescription, whether a medical condition is affecting your sight, or whether you genuinely cannot meet the standard. Bring any documentation from your eye doctor to your next DPS visit — it helps the examiner understand your situation and may speed up the process.
Preparing for the vision test
Bring your glasses or contacts if you wear them. Make sure they are clean and in good condition — smudged lenses or bent frames can affect your results. If you have recently changed your prescription, wear the new glasses or contacts to the test.
Get a good night's sleep before your appointment. Eye strain and fatigue can make it harder to read the chart clearly. If you have had eye surgery, cataract removal, or other recent eye procedures, tell the examiner — they may need to note this on your record.
Vision test requirements by license type
The 20/40 standard applies to all driver's license types in Texas: Class C (regular passenger vehicle), Class B (motorcycle), and commercial licenses. Commercial drivers have additional medical requirements beyond the vision test, but the basic vision standard is the same across all categories.
If you are renewing your license rather than getting one for the first time, you will still take the vision test. The test is the same whether you are 16 or 76 — Texas does not waive it for any age group or reason.
What the vision test does not check
The DPS vision test is a screening tool, not a full eye exam. It does not test color blindness, which matters for reading traffic lights but is not a legal requirement for driving in Texas. It does not test peripheral vision — your ability to see to the sides — or depth perception, which helps you judge distance and speed. It does not check for astigmatism, presbyopia, or other refractive errors beyond basic acuity.
If you are concerned about any of these abilities, an eye doctor can test them and advise you on whether you are safe to drive. Some people pass the DPS vision test but have other vision problems that affect their driving. An eye exam at an optometrist's or ophthalmologist's office is more thorough and can catch issues the DPS screening misses.
Frequently Asked Questions
Can I wear sunglasses during the vision test?
No. You must remove sunglasses and any tinted eyewear during the test. If you wear prescription sunglasses, you can wear those if they are your normal driving glasses, but the examiner may ask you to remove them for the chart reading portion.
What if I cannot read English well?
The vision test uses letters or numbers, not words, so language is not a barrier. The examiner will point to the chart and you tell them what you see. If you have questions about the process, DPS offices have interpreters available — call ahead to request one.
Do I have to pass the vision test on the same day as the written test?
Yes. You must pass the vision test before you can take the written knowledge test. If you fail vision, you stop there and can retake it another day. You cannot move forward to the written or driving test without passing vision first.
What if I have had eye surgery recently?
Tell the examiner about any recent eye surgery or procedures before the test. Some surgeries temporarily affect vision, and the examiner may note this on your record. If your vision is still healing, you may want to wait a few weeks and retake the test once your eyes have fully recovered.
Can I bring a note from my eye doctor instead of taking the test?
No. You must take the vision test at the DPS office. However, if you fail and want to dispute the result, a note from an eye doctor showing you meet the 20/40 standard can help you understand what went wrong and may support a retest.