Quantum Dots Enable 3-D Printing of Contacts Lens With LEDsWhile the research may have only aimed to demonstrate what is possible for 3D printing of electronic devices, researchers at Princeton University have used 3D printing to create an entire contact lens with light-emitting diodes (LEDs) embedded into it. For the contact lens to actually work, it would require an external energy source, making it impractical as a real-world device. However, the real
