The vision test — Connecticut Permit Test

The vision test on the Connecticut permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.

The rules

Every class of Connecticut license needs vision of at least 20/40, with or without glasses or contact lenses.

Glasses count toward the standard. What matters is what you can see while driving, not what you can see unaided.

The minimum vision requirements for all classes of license are at least 20/40 with or without glasses or contact lenses.
Connecticut Driver's Manual, p.5

An applicant blind in one eye needs at least 20/40 in the other eye and a visual field of 100 degrees or more.

One eye can still do the job, but it has to cover the side the missing eye used to watch. The field is what is being measured.

If the applicant is blind in one eye, the other eye must be at least 20/40 with a minimal visual field of 100 degrees or more.
Connecticut Driver's Manual, p.5

The Connecticut eye test measures acuity, which is how clearly you see.

Sharpness is only half of sight, and it is the half a wall chart can measure. The test starts there.

Acuity (how clearly you see).
Connecticut Driver's Manual, p.5

The eye test also measures peripheral vision, which is how far you can see to either side while looking straight ahead.

A driver looking down the road still has to catch the car coming from the side. That catch is peripheral vision doing the work.

Peripheral vision (how far you can see to either side while looking straight ahead).
Connecticut Driver's Manual, p.5

If your license says you must wear corrective lenses, driving without them can get you a citation.

The restriction is part of the license. Driving without the glasses is driving outside what the state licensed you to do.

If your driver's license says you must wear corrective lenses and you are stopped by a law enforcement officer while not wearing them, you may be issued a citation.
Connecticut Driver's Manual, p.5

Connecticut suggests having your eyes checked by an eye specialist every year or two.

Sight fades slowly enough that you do not notice. A test is the only thing that tells you before a near miss does.

you should have your eyes checked every year or two by an eye specialist
Connecticut Driver's Manual, p.5

On the test

What is the minimum vision requirement for a Connecticut license?

20/40 with or without corrective lenses. Glasses count toward the standard. What matters is what you can see while driving, not what you can see unaided. Connecticut Driver's Manual, p.5: “The minimum vision requirements for all classes of license are at least 20/40 with or without glasses or contact lenses.”

How this works

Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.

You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.

Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.

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Where these come from

Every rule here is checked against Connecticut Driver's Manual, published by the Connecticut Department of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.