Monkeys' Perception of the World Reveals Subtle Differences, Scientists Find.

Researchers have discovered that humans have a greater range of blue tones in their vision compared to monkeys due to small differences in the structure of the retina. The study focused on the fovea, a part of the eye crucial for picking out detail, and found that connections between short-wave cones with long and middle-wave cones that exist in humans, a circuit sensitive to blue light, are mostly missing in marmosets and macaques. The findings add some interesting detail to what we know about how we process visual information and send it to the brain.