20/20 vision, which is considered “normal” vision, means that somebody can read the same line of letters while standing 20 feet away from an eye chart that a normal person is able to see at 20 feet. If you have 20/40 vision, it means that a person sees at 20 feet what a normal person would see at 40 feet. In other words, for a person with 20/40 vision, objects need to be at half the “normal” distance for him or her to see them clearly. A person with 20/40 vision would be considered nearsighted, or myopic, because they are unable to focus on distant objects as easily as somebody with normal vision and thus need to stand closer to the object for it to be in focus.
Pediatric Myopia Vision Screening & Detection These FAQs discuss topics including: Myopia, Nearsightedness, Myopia Vision Screening, Myopia Vision Testing, Pediatric Myopia Vision Screening, Pediatric Myopia Vision Testing, Nearsightedness Vision Screening, and Nearsightedness Vision Testing.