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#1
Old 01-07-2003, 12:38 AM
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Join Date: Aug 2001
Location: The Crapper
Posts: 1,423
If 20/20 is perfect vision then...

Why did they tell me mine is better than 20/20? I have 20/10 in one and 20/15 in the other.

When the doc looked at my chart he sez: " you have the eyes of a fighter-pilot" and the nurse is always astounded at how far down the chart I can see.

My 20/15 20/10 vision comes up in passing conversations more than you'd think(like when I can see something far off others can see, but can't quite make out details I can)

Here's how the conversation usually goes:

them: "Wow whats your vision?"
me: "20/10-20/15 supposedly better than 20/20"
them: "but I thought 20/20 was perfect"
me: "me too, go figure, helephino"

Why is 20/20 considered perfect vision,and what does that make my vision?
#2
Old 01-07-2003, 12:40 AM
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Join Date: Aug 1999
Location: Stockholm, Sweden
Posts: 5,648
20/20 is a benchmark standard that is considered to be very, very good. Think of it more like "perfectly good" than "perfect".
#3
Old 01-07-2003, 12:42 AM
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Location: Flavortown
Posts: 35,060
20/20 isn't perfect, just normal. You see at 20 feet what most people see at 20 feet; 20/15 means you see at 20 feet what most people can only see at 15. Perfect vison would be 20/0.
#4
Old 01-07-2003, 12:56 AM
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Join Date: Mar 2001
Location: Pratts, Mississippi
Posts: 6,246
Quote:
Originally posted by Fear Itself
Perfect vison would be 20/0.
And Superman is the only person with 20/0.
#5
Old 01-07-2003, 06:52 AM
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Join Date: Oct 2002
Location: Texas
Posts: 34
Fear Itself is correct. 20/20 vision is not perfect it's an indication of normal/average. So 20/15 20/10 vision is quite possible. I recall that major league baseball outfielders often have much better than 20/20 vision. Helpful I suspect given their profession.
So given the general population there plenty of people with eye sight better than average and many with worse than average.
#6
Old 01-07-2003, 07:02 AM
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Join Date: Oct 2002
Location: in continent
Posts: 251
and remember the 20 isn't just some arbitrary number. At distances closer than 20 feet (6 metres), your eye starts to accomodate because the image is falling behind the retina.

In such terms, there's no such thing as 20/0 vision - you cannot accomodate enough to focus on something touching your cornea.
#7
Old 01-07-2003, 07:35 AM
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Join Date: Mar 2000
Location: Washington dc
Posts: 16,441
Quote:
Originally posted by Dada321
So given the general population there plenty of people with eye sight better than average and many with worse than average.
Except in Lake Wobegone where they are *all* above average.
#8
Old 01-07-2003, 08:50 AM
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Join Date: Aug 2001
Location: Bedrock
Posts: 26,079
I think 20/1 would be perfect.

20/0 seems like brown nosing.
#9
Old 01-07-2003, 09:44 AM
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Join Date: May 2001
Location: In another castle
Posts: 18,988
Interesting. I'm also 20/10 in one eye, and 20/15 in the other.
#10
Old 01-07-2003, 12:30 PM
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Join Date: Mar 1999
Location: NY (Manhattan) NY USA
Posts: 19,769
I'm *correctible* to better than 20/15 and this leads to the annoying situation where the optometrists consider themselves to have established my prescription when I can read the 20/20 line.

I like to be able to read the ingredients off the back of a Lysol spray can sitting 12 feet away.
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