An array of light receptors on a hemispherical surface has been completely 3D printed by the team of researchers at the University of Minnesota. This discovery marks a significant step toward creating a 'bionic eye' that could someday help blind people see or sighted people see better. Extrusion‐based 3D printing, an emerging technology, has been previously used in the comprehensive fabrication of light‐emitting diodes using various functional inks, without cleanrooms or conventional microfabrication techniques. Here, polymer‐based photodetectors exhibiting high performance are fully 3D printed and thoroughly characterized. The researchers also hold the patent for 3D-printed semiconducting devices.