Final answer:
Neural grooves are the pocket-like structures that form during early eye development. They come from the bending and folding of the neuroectoderm, which eventually develops into the neural tube and the central nervous system.
Step-by-step explanation:
The grooves that become pocket-like structures during early eye development are called neural grooves. As the embryo develops, a specialized region of the ectoderm called neuroectoderm forms a neural plate, which then buckles and folds inward to create the neural groove. The neural groove eventually forms the neural tube, which gives rise to the central nervous system.