It takes an exceptionally skilled tinkerer to make something like this. These small, simple goggles, don't look like much; a skinny leather band, a rough lens housing together with purple lenses. While you are wearing these glasses and attuned to them you gain blindsight out to a distance of 30ft. Additionally you gain immunity to the blinded condition and can see through magical darkness (also 30ft).   

Notes: Sense: Darkvision, Detection, Eyewear