Drs. Donald Zack and Valentin Sluch spent 30 anxious days waiting for their experiment to yield results.
They were eager to see if the retinal ganglion cells growing in their lab would turn red, indicating that they'd successfully edited the cells' DNA. Turning the eye cells red would allow them to be sorted from other cells and potentially provide the key to research that one day could lead to a cure for blindness caused by glaucoma or multiple sclerosis.
"I was checking every day," Sluch said. "When I first saw red cells in the cultures, I was really excited and I ran to get a colleague to tell them that it worked."
The breakthrough of growing eye...