Check out this Quara post (http://goo.gl/YjQYI) for some new and old optical illusions. What caught my eye was the optical illiso on the left I haven’t seen before. Can you tell the difference between the male and female pictured? Well you shouldn’t, they are the exact same image. The illusion here takes advantage of how our perception of gender is based on hues and tones as much as the facial features themselves.