1.0 link Rainbow Dash Network http://rainbowdash.net/ adiwan (adiwan) http://rainbowdash.net/adiwan http://rainbowdash.net/notice/4360488 I used probably the worst head-mounted display in existence. It's a hand-made HMD with eye tracking. The optics (two simple lenses) are so bad that after 40 minutes using it I had the worst eye problems imaginable. I couldn't see properly for over an hour. I saw everything double and my eyes were aching a lot. At least I get 20€ for this <span class="striket">experiment</span> torture.