51�Թ�

Photopolymer resins, which harden -- or cure -- on exposure to light, are commonly used in the manufacture of bespoke 3D printed parts.

In contrast, the Birmingham-led team has, for the first time, succeeded in producing a photopolymer resin that can be printed at high resolution but can then be broken back down to its constituent parts, recycled and reprinted, with the addition of just a small amount of photoinitiator to maintain the material's curable properties.

It is made of photopolymer resin and was created using a 3D printing technology often used to make tiny mechanical models and structures.

Underneath the silicone, there’s gel containing a photopolymer that reacts to light.

That laser bounces off a piece of photopolymer material built into the glasses’ right lens, then heads into your eye.