Yes i did quote wiki, for it is quite respected… visual acuity being rather popular. The information is correct. No need to get bent out of shape cause you feel that 20/20 is perfect and there is nothing better…
just fucking google visual acuity
http://www.tedmontgomery.com/the_eye/acuity.html
one simple source, all of which have the same info, I personally don’t want to search through med journals when the info is readily available elsewhere