Originally posted by jct us101 I would think that people who wear glasses and contacts would probably not be affected by it since there is an actual glass lens that is keeping them from having their eye right up against it.
If you've got your eye so close to the camera that a contact lens makes a difference to whether your eye is against the viewfinder, you might want to back off just a little and stop trying to mash it into your face. ;-) You can be at one with your camera mentally, without physically being AT ONE with your camera. :-D
I can't see there being any such issues with an EVF (and I've used plenty in my time). You can buy LCD-based video goggles / video glasses relatively easily, marketed for watching movies or playing computer games. While their manufacturers generally recommend taking a break every ~30 minutes or so to avoid eye strain (and because you tend to blink more slowly while focusing on them), you'd still spend far more time looking at these in one stretch than you would your camera's viewfinder. If you can use the video glasses safely for half an hour at a time, there's pretty little chance of injury from spending a few minutes at a time staring into your EVF... :-)