Hacker News Reader

When it comes to visual acuity for TV watching, doing calculations while basing yourself on their suggested '20/20 vision'=1/60 of a degree, is probably wrong (on average) :

https://www.homecinemaguru.com/can-we-see-4kuhd-on-a-normal-...

(The real limit seems only to start around 310 pixels/degree !)

View on HN

That would suggest with the naked eye you could look at the moon and pick out features about 20km wide

https://skyandtelescope.org/observing/how-to-see-lunar-crate...

"At 0.8′ (arcminutes) across, the crater alone hovers at the naked-eye limit"

Which seems to back the the c. 1/60th idea.

Judging the resolution of an eye is a subjective process, not least beacuse of the relative sensititivty and density of rods and cones at different parts of the eye.

Exactly, 'subjective', the criteria the NHK used is 'sense of realness', not 'being able to consciously pick out features'.

Reply on news.ycombinator.com