The eye test is a quick vision screening that happens before you take the written and driving portions of your Texas license exam

The eye test, officially called the vision screening, checks whether you can see well enough to drive safely. A Department of Public Safety (DPS) examiner will show you a machine called a vision screener — it looks like a box you look into — and you'll read letters or symbols at different sizes. The test takes about one minute. You don't need to study for it, but you do need to pass it to move forward with your exam that day.

If you wear glasses or contacts, bring them with you. The examiner will test your vision with the correction you plan to wear while driving. If you fail the vision screening, you won't be allowed to continue with the written test or road test that day, and you'll need to return after you've had your vision corrected.

Key Takeaways

  • The vision screening uses a machine where you read letters or symbols; it takes about one minute and happens before your written test.
  • Bring your glasses or contacts if you wear them, because the test measures the vision you'll actually have while driving.
  • You must pass the vision screening to take the written and driving tests on the same day.
  • If you fail, you can return another day after visiting an eye doctor to correct your vision.
  • Texas law requires you to have at least 20/40 vision in each eye, with or without correction, to hold a driver's license.

What the vision screener measures

The vision screener tests your visual acuity — how clearly you can see letters and symbols at a standard distance. The machine shows you characters in decreasing sizes, and you read them aloud to the examiner. The test measures each eye separately, so the examiner will ask you to cover one eye at a time.

Texas requires a minimum of 20/40 vision in each eye to hold a driver's license. This means you can see at 20 feet what a person with standard vision can see at 40 feet. If one eye doesn't meet 20/40 but your other eye does, you may still pass — the examiner will explain the result to you. Some people have one eye that's much weaker than the other, and that's often still acceptable under Texas law.

The screener does not test color blindness or peripheral vision. Those are separate concerns that an eye doctor would evaluate, but they're not part of the DPS vision screening.

Bringing glasses or contacts to the test

If you wear glasses or contacts to drive, wear them to your exam appointment. The examiner will test your vision with the correction in place, because that's the vision you'll have behind the wheel. If you wear bifocals or progressive lenses, let the examiner know — they may ask you to position your head slightly differently to read the chart through the correct part of your lens.

If you wear contacts, make sure they're clean and properly inserted before you arrive. If a contact lens falls out during the test, tell the examiner when ready. They can pause the screening, and you can reinsert it or switch to your glasses if you have them with you.

If you don't normally wear correction but think you might need it, visit an eye doctor before your exam. Showing up without glasses when you actually need them will result in a failed vision screening, and you'll have to reschedule.

What happens if you fail the vision screening

If you don't meet the 20/40 standard in one or both eyes, the examiner will tell you that you've failed the vision screening. You will not be allowed to take the written test or road test that day. Your exam appointment ends there, and you'll need to schedule a new appointment after you've had your vision corrected.

A failed vision screening doesn't count against you in any permanent way — it straightforward means you need to address your vision before you can continue. Visit an eye doctor, get a new prescription if needed, and obtain new glasses or contacts. You don't need to bring a letter from the eye doctor to your next DPS appointment; the examiner will straightforward re-run the vision screening when you return.

If you're unsure whether your current vision correction is strong enough, an eye exam before your DPS appointment can save you a trip. An optometrist or ophthalmologist can tell you whether your prescription meets the 20/40 requirement.

Preparing for the vision screening

There's no way to study for the vision screening — it measures your actual eyesight, not knowledge. The best preparation is to make sure your vision correction is current. If your last eye exam was more than a year ago, consider scheduling one before your license exam, especially if you've noticed any change in how clearly you see.

On the day of your exam, arrive well-rested and with clean glasses or fresh contacts. If you wear glasses, clean the lenses before you leave home so the examiner can see your eyes clearly and you can see the chart without smudges. If you wear contacts and they feel uncomfortable, bring your glasses as a backup.

Bring your appointment confirmation, proof of identity, and proof of residency to your DPS visit. The vision screening is just one part of the exam process, and you'll want to be ready for everything else as well.

Vision requirements for different license types in Texas

The 20/40 vision standard applies to most driver's licenses in Texas. However, if you're seeking a commercial driver's license (CDL), the vision requirement is stricter: you must have at least 20/40 in each eye, and your combined field of vision must be at least 140 degrees. A CDL vision screening is more thorough than a standard license screening.

If you have a medical condition that affects your vision — such as cataracts, macular degeneration, or diabetic retinopathy — talk to your eye doctor about whether you meet the legal standard. Some conditions can be managed with new glasses or surgery, while others may require you to explore other transportation options.

Frequently Asked Questions

Can I wear sunglasses during the vision screening?

No. The examiner needs to see your eyes clearly, and the vision screener requires you to look directly into the machine without any obstruction. Remove sunglasses and any tinted eyewear before the test begins.

What if I can't read English well — will the vision test be hard to understand?

The vision screener shows letters and symbols, not words, so language isn't a barrier. You straightforward tell the examiner what you see. If you have questions about the process, DPS offices have interpreters available, and you can request one when you schedule your appointment.

Do I need to bring proof from an eye doctor that my vision is good enough?

No. The DPS examiner will conduct the vision screening themselves using their own equipment. You don't need a letter or document from an eye doctor. If you fail and then get new glasses, you just come back and take the screening again.

Can I retake the vision screening the same day if I fail?

No. If you fail the vision screening, your exam appointment ends, and you must schedule a new appointment. This gives you time to visit an eye doctor and get your vision corrected before you try again.

What if I have one eye that's much worse than the other?

Texas tests each eye separately. As long as each eye individually meets at least 20/40 vision, you pass. If one eye is 20/40 and the other is 20/100, you still meet the requirement. The examiner will explain your individual eye results to you.