From Iron Man's Iron Manual Page 1:
I intend to do away with the eye holes altogether — technically speaking l haven't directly looked at anything in years from inside my suits though I'm not sure about the psychological value of removing an anthropomorphic pair of eyes confronting an enemy. Inspiring fear and all that. Needs more study.
The cybernetic antenna is also made of specialized flexmetal with psi-wave sensors built-in. The thermal control layer uses electronic cooling to regulate my skin temperature and transpire moisture, which is osmotically pumped away. All of those devices and materials are made around the embedded flexmetal construction method.
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