Expensive, indeed, need an economy of scale and coverage from Insurance Companies

The company released its latest pair of glasses, eSight3, last February. The glasses, which look like a visorlike headset, are rechargeable and good for eight hours on a single charge. Each houses a high-speed, high-definition camera that captures what the user is looking at. The device uses algorithms to enhance the video feed and displays the video through eSight's OLED screens in front of the user's eyes. Almost immediately, the cameras enhance the footage that beams across two screens, one in front of each eye. A 24-times zoom also helps out.

https://www.cnbc.com/2017/09/20/these-amazing-electronic-glasses-help-the-legally-blind-see.html