Andrew Huberman· PhD
It's vitamin A that's essential for the so-called phototransduction cascade. The phototransduction cascade is the process by which the photoreceptors, which are in the back of the retina, at least if you're human, they're in the back of the retina, take photons, light energy, and convert it into electrical signals that's then conveyed to the other cells and neurons within the retina and then passed into the brain to create visual perceps.