3D printed anything is definitely a global trend. In the optical industry, 3D printed eyeglasses are already being made, the first 3D printed lenses are being developed and not 3D printed contact lenses.
Princeton’s LED 3D printer has taken the next step beyond printing quantum dot LEDs: it has managed to integrate them with a standard contact lens, creating a device that can project beams of coloured light.
It’s not wearable yet: The lens itself is made of hard plastic, which is unsuitable to be worn on the eye, and the QLEDs require an external power supply. However, it does demonstrate the feasibility of 3D-printed electronics, integrated with complex shapes to create fully realised devices.
Read more at CNET