3-D printing of human corneas may end wait times for people on transplant waiting lists. 3-D printing is a manufacturing process that creates a physical object from a digital design. Now, according to a paper published online on May 30, 2018 in the journal Experimental Eye Research, scientists are using 3-D printers to make human corneas — an advancement that could dramatically ease the shortage of corneas from donors. However, this promising 3-D printing technique may help people see better without the prolonged wait. That's where this new 3-D printing technique comes into play.