I’m now in my mid-40’s and I can’t focus so closely any more. This first became a problem a few years ago with my 4X5 view camera’s ground glass.
But now it means that Live View requires that I stand back 12" or so for a clear view. It gets worse each year, and it happens to everyone, it‘s presbyopia. And no, Lasik won’t fix it—it will make it worse.
Even if you have younger eyes, bright light can make the LCD screen on today’s cameras difficult to see.
See my previous comments, and Hoodman now has a new and improved 3" version, even better!