What Is a 20 20 Line
Having 20/20 Vision Doesn’t Mean You Have “Perfect” Vision, but It Does Mean Your Vision Is Sharp and Clear. … at 20 Feet Away, the Size of the Letters on a...
Having 20/20 vision doesn’t mean you have “perfect” vision, but it does mean your vision is sharp and clear. … At 20 feet away, the size of the letters on a Snellen eye chart, on one of the smaller lines near the bottom, has been standardized to correspond to “normal” visual acuity. This is the 20/20 line.
What does 20/20 mean on the Snellen eye chart?
What does “20/20” vision mean? Snellen charts help to determine a baseline for your vision in each eye – a baseline typically measured against “20/20” vision. This means when you are 20 feet away from an object, you can comfortably see details that most people with normal vision can also see at 20 feet distance.
What does each line on the eye chart mean?
The top number refers to the distance in feet that you stand from the chart. The bottom number indicates the distance at which a person with normal eyesight can read the same line you correctly read. A person with 20/20 vision can see what an average person can see on an eye chart when they are standing 20 feet away.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
