LGN to pulvinar from there to cortex. Project to area 17 - direct connections only with 18 and 19. Columnar arrangement of cortical projection MENU Visual Reflex Superior colliculi Topographical representation Reflex Accomodation focusing, tracking, etc. Confirmed by recent research. Each bipolar cell receives information from 2 or 3 types of cones.
Effect enhances discrimination ability.
Proposed by Ewald Hering. Based upon negative afterimages. If you look through red lenses you will still see color unless only one is present, then color will look red - color constancy. Certain areas of the cortex follow the retinex theory - others don't. Several types - some people lack one type of cones.