People with changing low vision capacity ( eg. macular disturbances, 1:3 in AU ), or those requiring to view miniature detail, presently use bulky Micro Fiche style desk mounted slider magnifiers.
For those of us with reduced coordination, there is also a need for portability.
By use of hands free & less bulky device (headset) they could overcome Optical /Dexterity hurdles during the reading / inspection activities. Is there a Star Trek concept headset that allows users to better interact with active reading/ magnification challenges?