The world's population is split in eye-dominance; 60% right-eye, 40% left-eye and catering to this difference initially proved very difficult to solve. Some avenues explored involved complex mechanisms and tricky inteterfaces for the user. The solution was beautifully elegant in the end; a split between the HARDgoods and the SOFTgoods.
The Hardgoods represents the major working elements of the HC1; the optics, the PCBs, the battery etc. The Softgoods represents the ergonomics; the adaptable hinge mechanism, the padding, the headstrap. The softgoods can be 'owned' by the user (no user has to share sweaty or well worn padding) and can easily be replaced over time.
All this and the hardgoods/softgoods interconnect allowed for simple rotate to create a left/right eye solution!