Two previous prototype made by NIII used either near-infrared light or reflectors to fool the cameras into not seeing a face, but they looked super dorky. The new glasses seem to no longer have that problem, resembling the kind of wrap-around sunglasses favored by everyone from security contractors to extreme sporting enthusiasts. Instead of the electrically powered near-infrared lights of the earlier visors, these glasses use an unspecified novel material to absorb and reflect light, as well as angles and patterns on its lenses. Tests with smartphone cameras showed that the glasses fooled facial recognition 90 percent of the time.
Unsheilded faces alone fool recognition 80 percent of the time*, so that's a big jump!