They say hindsight is 20/20, but what does that number mean exactly? These numbers follow a grading system used by your eye doctor to measure visual acuity— that is, the clearness of your eyesight. It’s a measure of the focal length for both your eyes with the first number representing your left eye and the second number is for your right. The higher the numbers are, the shorter the focal length is, which means you likely have to move objects much closer to your face just get a good look at them.
20/20 is often used to denote “perfect” visual acuity but does it really mean your eyes are perfect? Let our ophthalmology specialists at AAPECS Atlantic Eye Care explain what these numbers mean for you and your vision.
What Is Visual Acuity?
Today, eye exams for visual acuity measure much more than the sharpness of your vision. The standard Snellen chart tests are carried out along with high-contrast testing. However, with all the developments in the field, these eye exams still have their limitations. For example, they are unable to measure how you perceive moving objects, colored objects or even low-contrast objects.
When you have clear eyesight, people will often say you have 20/20 vision. The numbers represent visual acuity by measuring the distance your eyes can sharply focus on. Twenty simply means 20 feet and that you can see objects clearly at a distance of 20 feet. The largest E at the first line of the Snellen chart denotes a distance of 20/200. If that’s as far as your eyes go, then your visual acuity is 20/200 (and legally blind).
Clearer Than 20/20
There are many eye care center facilities who have tested children having lower numbers, which means they have sharper vision. As a person ages, these numbers tend to go down and 20/20 becomes the standard.
Get your visual acuity measured by our expert doctors at AAPECS Atlantic Eye Care. Schedule an appointment now by calling us at (757) 340-7070 or filling out our contact form. We serve Virginia Beach, VA.