While there have been some companies researching how to 3D print viable human corneas, it's not something we hear about often...as least not as much as we hear about other organs that can be donated, like the liver. There are over 10 million people around the world who are blinded by corneal pathology, but there aren't nearly enough donors. That's why the Biomedical Research Institute of La Paz Hospital (IdiPAZ) in Spain is working to 3D print cornea substitutes, using a patient's own stem cells. The IdiPAZ team is using cellular bioengineering to manufacture these substitutes, using biological materials and stem cells, which will be 3D printed as an alternative to donated human corneas, so patients can regain vision. Read more at 3DPrint.com: http://3dprint.com/184469/spain-3d-p...ornea-project/