I just dont see it *blink*

[Xmas]

The viewing distance calculator mentioned in my original post above has a downlodable Excel file version which allows you to change visual acuity - the difference seems to be close to linear though, so 20/15 visual acuity should result in a ~34% increase of the optimal distance (or proportional decrease of diagonal size/pixel pitch).
http://carltonbale.com/home-theater/home-theater-calculator/

But then visual acuity isn't the limit when it comes to noticing the effects of a pixel grid, especially when typical content on a computer screen is mostly vector or pixel based rather than photographic.

http://filmicworlds.com/blog/no-its-not-a-retina-display/

 

[zed]

Zed manages that a lot. The secret is knowing his own special variation of English - he talks in extremities. For normal people, we'd have a scale from fabulous to terrible. On that scale, 20/20 vision is 'good'. For Zed though, anything less than phenomenal == shit. Ergo, 20/20 vision is 'bad', because he has no gradations between bad and good. If everyone could apply a language filter to Zed's postings, and interpret every 'bad' as 'less than ideal', it'd all make sense.

If its good enough for the trumpster then its good enuf for me

So one could say Zed's communications are shit?

yes I have often written this here

OK back to normal vision acuity (been away at a roger waters concert so my heads still a bit foggy)
I went to google scholar and typed Vision acuity into the searchbar, and what do you know theres a paper on the solely about the subject
http://www.netlibrary.net/articles/visual_acuity

Normal visual acuity is mistakenly referred to as 6/6 vision, the USC equivalent of which is 20/20 vision. At 6 meters or 20 feet, a human eye with nominal performance is able to separate contours that are approximately 1.75 mm apart.[4] Vision of 6/12 corresponds to lower than nominal performance; vision of 6/3 corresponds to better performance. Normal individuals have an acuity of 6/4 or better.

The significance of the 6/6 standard can best be thought of as the lower limit of normal or as a screening cutoff. When used as a screening test, subjects that reach this level need no further investigation, even though the average visual acuity with a healthy visual system is typically better.

another paper
http://europepmc.org/abstract/med/7609941

This provided VA results from 223 subjects (age range 18 to 80 years). Mean logMAR VA improved from -0.13 (Snellen equivalent 6/4.5) in 18- to 24-year-olds to -0.16 (Snellen 6/4(-1)) in 25- to 29-year-olds and then gradually became worse with age to a mean value of -0.02 (Snellen 6/6+1) for subjects over 75 years of age. The inadequacy of 6/6 as a norm value of VA is illustrated. The data show VA levels far superior to the data from the standard references of Pitts (1982) and Weale. (1975, 82)

even the old dudes tested had better than 20/20 vision!