“Organoids are tiny, self-organized tissue cultures. They’re comprised of stem cells that can be programmed to replicate naturally occurring tissue. Using them, scientists can grow mini organs of various types for research purposes, and, not surprisingly, there’s a lot of interest in mini-brains. Researchers from the D’Or Institute for Research and Education (IDOR) have announced the creation of one that includes retinal cells — primitive eyes…”
Source:
https://bigthink.com/surprising-science/brain-science?rebelltitem=1#rebelltitem1