This was the first time wearing the helmet.
For the eyes, I used pieces cut from a transparent-blue rubbermaid container. It was the best for visibility, while refracting the light in a manner that resembled Iron Man's. The LEDs inside the mask were wired through the helmet, and into my Arduino. On the inside of the helmet I also wired a Magnetic Reed switch, that when the mask was closed, turned on the eye LEDs, and when open, turned them off. (The switch ended up being unreliable, and so I just had the LEDs on permanently.)