/diy/ - Do It Yourself

1) Personally I think the binocular would be more effective and balanced. To fix the narrowing vision problem you could:
-trial and error test some optical lenses in front of your webcam.
-make some sort of Google glasses projection onto safety glasses like setup.

2) If you have the technological know how I think a camcorder screen would work just fine. You could also look at mini car LCD screens(used for backup cameras), they sell a 20$ one on Amazon that 3.5' and the reviews looked good. I had never looked at Kopin mini displays before you brought it up, but they look mighty fine, if not expensive.

Related:
http://videos.howstuffworks.com/computer/wearable-computers-videos-playlist.htm#video-2546
http://www.youtube.com/watch?v=GRKMFFDcoUk
http://www.youtube.com/watch?v=SiMHTK15Pik