Highly contextually dependent: most of the early-detection neurons are exactly what you describe: edge-detectors, color similarity detectors, etc. They become a

Highly contextually dependent: most of the early-detection neurons are exactly what you describe: edge-detectors, color similarity detectors, etc. They become a thing right from the birth of a child and would never develop if the child could never see at all (they have a very rigid structure, so the random development is out of the equation). So you’re clearly touching upon the definition of what is it to “have the vision” and what is it to “obtain the vision” as it’s not binary anymore: there are many levels to “vision”, most of which overlap as well.