The primary visual cortex is what sends information to the secondary visuals, which are important for color, motion, and depth perception. If the primary visual is damaged, then it can cause problems for the secondary visuals, which are important for the three reasons listed ^.
Water and hydrocloric acid in our stomachs.
Diet high in fiber, low in refined carbs, high in lean protein, low in cholesterol and saturated fat with moderate excercise
