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 ^.
Answer:
Frequent urination.
Increased thirst.
Always feeling hungry.
Feeling very tired.
Blurry vision.
Slow healing of cuts and wounds.
Tingling, numbness, or pain in the hands or feet.
Patches of dark skin.
Explanation:
Attention to detail and timeliness are important skills for this.
10-13 years normally.
Hope this helps, and good luck!