Usually about 25” from a 21” LCD. Sometimes as far as 29”. I can’t get closer (comfortably) than about 18” without my reading glasses.

I’m about the same — maybe an inch less. I have two 19” Dell flat screens.

24” from a 23” Mac Display

I’m about 31” from a 24” display. I used to have a 19”. The big one is actually burning my eyes out. I hate it.

I think we all remember our parents telling us not to sit too close to the TV.

Just measured, and my eyeball-to-screen distance ranges from 16” to 30”, depending on how I’m sitting. Typically, it’s around 20”.

burning my eyes out

Yes, the iMac a bit too bright, and you can’t lower the brightness enough!
What I do is make sure there’s plenty of ambient light in the room.

BTW, the reason that 21” works for me is that it’s just beyond the threshold of being able to see the vertical lines of the screen.

24” from a 21 ” display.

26 inches from my 23” flatscreen Mac Cinema display. I calibrate with a Gretag and can adjust brightness as I like..

ChrisL

15” to 30” inches from 21 inch LCD monitor