20/20 Vision

Congratulations, you’ve got 20/20 vision… so what does that mean exactly?

20/20 vision (sometimes called 6/6 vision when using Metric measurement) is the “standard” quality of vision seen by most people in the world. It is based off measurements taken from a Snellen Chart, which you’ll probably recognize:


Scientists have figured out what the average human eye is capable of seeing from 20ft away; this is represented in the numerator as “20” and remains constant no matter what your vision tests to be. What you’re actually able to see is represented by the denominator. This number represents what you are able to see in comparison to someone with 20/20 vision.

For example, if you have 20/40 vision, it means that from 20ft away you have vision that is equivalent to someone with 20/20 vision who is standing 40ft away. Sounds to me like this person REALLY needs glasses, which can correct your vision to 20/20 and sometimes better.

Remember that these measurements are still just an estimation. Two people with 20/40 vision can have radically different eye prescriptions, but still have a similar experience of vision. You can learn more about your prescription on our website.

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