Perfect vision is a term used to describe the sharpness of vision, and it is generally assumed that "20/20" is perfect vision. However, 20/20 vision is not actually perfect vision, but rather it is considered to be normal or average vision. Normal visual acuity is considered to be 20/20 vision, which means that you can see clearly at 20 feet details that should normally be seen at that distance. Many people, mostly children, have better than 20/20 vision, and healthy eyes can easily go down to the 20/15 level with some accuracy. Therefore, perfect vision is not something that the human eye can achieve, and it is possible that it does not exist at all.
To understand what 20/20 vision means, it is important to know that visual acuity is measured using two numbers. The first number represents the distance between the person and the object being viewed, which is usually 20 feet in the United States. The second number represents what you see in comparison to the average person when you stand at that distance. For example, if you have 20/20 vision, you can see what the average person can see at 20 feet. If you have 20/10 vision, you can see what the average person can see at 10 feet[[2]](https://premiervisiononline.com/2017/02/08/what-is-perfect-vision...
