Right eye sees a little darker than my left?

Question

When I was looking out my curtain with right eye it seemed a little darker than when I looked out with my left. Is this normal?

Answer 1

This is normal. Humans have two eyes located side-by-side in the front of their heads. Because of the close side-by-side positioning, each eye takes a view of the same area from a slightly different angle. The two eye views have plenty in common, but each eye picks up visual information the other doesn't enabling the brain to create 3-D vision. So it's normal most of the time that you see different (darker/lighter) from your right/left eyes since they see things from different angles.