When I was about 9 years old, I was told that I had 20/10 eyesight after an examination. I thought 20/20 was perfect.
2006-09-30 07:37:42 · 8 answers · asked by Bob 3 in Health ➔ Other - Health
By looking at lots of people, eye doctors have decided what a "normal" human being should be able to see when standing 20 feet away from an eye chart. If you have 20/20 vision, it means that when you stand 20 feet away from the chart you can see what the "normal" human being can see. In other words, if you have 20/20 vision your vision is "normal" A majority of people in the population can see what you see at 20 feet.
If you have 20/40 vision, it means that when you stand 20 feet away from the chart you can see what a normal human can see when standing 40 feet from the chart. That is, if there is a normal person standing 40 feet away from the chart and you are standing only 20 feet away from it, you and the normal person can see the same detail. 20/100 means that when you stand 20 feet from the chart you can see what a normal person standing 100 feet away can see. 20/200 is the cutoff for legal blindness in the United States.
You can also have vision that is better than the norm. A person with 20/10 vision can see at 20 feet what a normal person can see when standing 10 feet away from the chart.
Hawks, owls and other birds of prey have much more acute vision than humans. A hawk has a much smaller eye than a human being but has lots of sensors (cones) packed into that space. This gives a hawk vision that is eight times more acute than a human's. A hawk might have 20/2 vision!
2006-09-30 07:47:03 · answer #1 · answered by shepardj2005 5 · 3⤊ 0⤋
20/20 is the setting for normal eyesight. Any number less than 20 is better eyesight... your eye that was 10 has GREAT vision ability... some eyes are 15/15 and their sight is better than the 20/20 sight level... So be happy that you have 20/10 it is much better than 20/20.
2006-09-30 07:49:10 · answer #2 · answered by Callie Kitty 5 · 0⤊ 1⤋
20/10 eyesight means that your eyesight is better than the general population's eyesight.
20/20 is the best eyesight that is needed by the average person.. so hence, your eyes are better than perfect!
2006-09-30 07:46:42 · answer #3 · answered by payal . 1 · 0⤊ 1⤋
No the most perfect eyesight is 30/30 my husband has perfect vision and can see just about anything...that is why I clown him so much about not missing anything! LOL
2006-09-30 07:47:03 · answer #4 · answered by beagirl40 4 · 0⤊ 1⤋
Contacts and glasses. :) I have terrible eyesight. I'm going to get laser eye surgery, though. Some day.
2016-03-18 03:06:23 · answer #5 · answered by Anonymous · 0⤊ 0⤋
20/20 is perfect but 20/10 there really is not difference
2006-09-30 07:45:36 · answer #6 · answered by pmktabbycat 3 · 0⤊ 1⤋
20/20 vision is considered perfect. 20/10 is better than perfect supposedly, or that's what my optometrist told me when I asked him what it meant when he said I had 20/15 vision.
2006-09-30 07:43:13 · answer #7 · answered by heatherly 1 · 0⤊ 1⤋
yes 20/20 vison is perfect and anything less than that is not just mean you are little far sighted but that is still good.
2006-09-30 07:48:08 · answer #8 · answered by ? 5 · 0⤊ 1⤋
i dont know but i thought 20/20 was perfect as well
2006-09-30 07:40:07 · answer #9 · answered by a 5 · 0⤊ 1⤋
you're right 20/20 is considered perfect
2006-09-30 07:45:01 · answer #10 · answered by natureutt78 4 · 0⤊ 1⤋