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FRISCO APPT | 972-210-2100

Williams Eye Care - Frisco

2601 Preston Rd.
Frisco, TX 75034

FAIRVIEW APPT | 972-218-0042

Williams Eye Care - Fairview

120 Town Pl.
Fairview, TX 75069

Home » What's New » Understanding 20/20 Vision

Understanding 20/20 Vision


Everyone has run into the terms visual acuity and 20/20 vision. Yet, do people understand what these terms actually mean?

The term 20/20 indicates the clarity and sharpness of sight measured at a distance of 20 feet. When you have 20/20 vision, that basically means that from a distance of 20 feet you can clearly see what is normally seen from that distance. Alternatively, 20/100 vision indicates that to see what most people can see from 100 feet, you would have be 20 feet away.

Each eye is evaluated separately. When your optometrist asks you to correctly read letters from the eye chart, the smallest row that you can read without error indicates the visual acuity in the eye that's being examined.

However 20/20 vision actually doesn't mean that your eyesight is totally free of flaws, because, after all, it only determines your distance vision. Other vital vision skills; the ability to focus on objects that are close by, contrast sensitivity, peripheral vision, depth perception, eye coordination and color vision - these are aspects of good vision. Also, someone with 20/20 vision can still have unhealthy eyes. People with damage to the nerves inside their eyes from diabetes, high blood pressure, glaucoma, or a range of other diseases might still have 20/20 vision, without the help of glasses. And because of this, your optometrist will always carry out a comprehensive eye exam, and not just a plain visual acuity test.

When you're having your next eye exam, you'll know exactly why we're asking you to read letters from the eye chart, and more!

office update 2 williams eye care


Because of the COVID 19 Virus we will only be staying open to meet the needs of patients with eye problems and emergency exams.

We will be deferring routine exams and delaying contact lens exams until further notice. We will be supporting our patients who were unable to come for their contact lens exams, due to these new restrictions, by extending your current contact lens prescriptions, whenever possible. Please call to discuss this option with us.

When all is settled, we will be calling our postponed patients to get them back in for those exams.

Patients over the age of 60 or in a high risk category will not be seen so please call ahead and speak to us before you come by.

If you have an emergency or medical issue, call us! We’re here to help!

Thank you so much!!! 972-210-2100