Human Vision
25% of brain volume is allocated to visual perception.
Human vision is a parallel & distributed system, involving 2 eyes, retinal processing, and multiple layers of processing in the striate cortex.
Most humans are trichromats and they perceive color in a 3-D color space (except for bichromats and monochromats).
Vision provides a high-bandwidth input mechanism... “a picture is worth 1000 words.”