I've always wanted 3D printed optics for custom eyeglasses + binoculars, but the prints always turned cloudy after washing. Hand-polishing can clear it up, but the process sucks.

Recently we've made some progress on doing it fast with a common kitchen material — saran wrap!
SLA printed lenses have great form, but develop a rough surface after curing.

Fixing this usually has been tried in many ways: dipped in resin (@amosdudley at Formlabs), manual sanding + spray paint (me on Youtube), or lots of elbow grease (Andy from How to make everything)

Imagine a world where earbuds don’t need charging — this is the vision of our research, Power-over-Skin Everyone has a devices like your phone that get charged daily — our approach allows these devices to share their power with other, smaller wearables (Fitbit, CGM) by coupling RF energy through the human body