After the cells developed into mini-brains, the optic cups formed 30 days later and fully matured at 50 days. Elke Gabriel
https://www.smithsonianmag.com/smart-news/mini-brains-grown-stem-cells-developed-eyes-can-sense-light-180978478/
After the cells developed into mini-brains, the optic cups formed 30 days later and fully matured at 50 days. Elke Gabriel
https://www.smithsonianmag.com/smart-news/mini-brains-grown-stem-cells-developed-eyes-can-sense-light-180978478/