Fact 11
Older brains take longer than younger ones to recognise complex shapes.
Fact 7
People with one kind of cone typically cannot distinguish between red and green.
Fact 2
Wounds to the back of the head, injuring the visual cortex, can cause blindness.
Fact 10
Vision grows worse as we age, when the muscles controlling the expansion and contraction of the pupils grow less efficient.
Fact 6
Every retina has a blind spot where the optic nerve exits the brain.
Fact 3
Aging eyes have trouble distinguishing among shades of blue.
