What’s the privacy feature that’s being sold ?
so, some geeky privacy kickstarter sells these for 10x the price
basically standard equipment for welding
https://www.amazon.com/3M-Protective-Eyewear-Infrared-40427-00000-10/dp/B007JZ3WOU
Discussion
infrared blocking lenses appear black to digital camera sensors, which are highly sensitive to infrared (they have IR filters on them to reduce this, but get an IR remote and point it at your phone camera and press buttons and you'll see the white light... this will make your eyes disappear behind a black shadow