The first vision type is 20/20. As per AOA, or the American Optometric Association, 20/20 refers to proper vision acuity, dealing with sharpness and clarity, at a distance of about 20 feet. It means the person can see pretty clearly 20 feet from the object. Another vision number is 20/100. It means the person will get to see objects from a 20 feet distance where others can see it from 100 feet. When it comes to length, the same rule goes for 20/60, 20/80, and more.
20/10 is another vision type, where the number goes down. It means a person has better eyesight than the average individual. While performing the test using an eye chart, the person with 20/10 vision can see clearly the object from 20 feet away, which others with normal vision can see at a distance of 10 feet. The last number is 20/200, where you are legally blind. It means the person has to stay 20 feet away from that object to see where it is; others can see it by standing 200 feet away from it. It is vital to remember that 20/20 does not mean you have excellent vision. It just means you get to see the usual clarity and sharpness at one distance, and it is the standard baseline to measure maximum people.