Nevertheless, one quite widely accepted explanation of the phenomenon is that the human eye sends information to two quite distinct visual systems in the brain: an advanced mammalian system, which is located in the occipital lobe, and an older, more primitive reptilian system located in the midbrain. Damage to the occipital lobe can stop signals from reaching the mammalian visual system, but it wouldn’t stop those signals from reaching the reptilian visual system in the midbrain.
