Yes.
If a person sees 20/15, at 20 feet from the chart that person can read letters that a person with 20/20 vision could read from 15 feet away.
Yes, 20 16 is better it means you have better than perfect vision
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20 20 Vision - 1999 was released on: USA: 16 April 1999 (Minneapolis-St. Paul International Film Festival)
It means that a person needs to be within 20 feet to clearly see what someone with "normal" (20/20) perfect vision can clearly see at 25 feet. It's good but not perfect vision
"Our vision for the future is better than 20/20"
slightly worse one eye
Normal vision as you can 16 feet of 16 feet.
Yes, 20 15 vision is better than 20 20 vision.
It means seeing at 20 feet what a person with normal vision sees at 20 feet. A person who has 20/40 vision can see at 20 feet what the person with normal vision sees at 40 feet, etc. Some people have better than 20/20 vision.
There is no vision score of 40/40. Vision is scored on the distance a person can see in feet. A vision score of 20/20 would be considered perfect sight.
20/10 vision refers to vision better than 20/20. A person having 20/10 vision would be able to see something at 20 feet that a person with 20/20 vision would see at 10 feet.
20/20 is "normal" vision. Some people have greater visual acuity, and their vision may measure 20/16, 20/12, or 20/10. A very few people may have greater than 20/10, but there is no standard measurement for that.