Optical illusion test: Blue, purple or red-- what's the colour of this dot and the science behind it

A biomedical optics engineer discovered a visual illusion where purple dots appear bluer in peripheral vision. This ...
Medical Xpress

Blue, green, brown, or something in between—the science of eye color explained

You're introduced to someone and your attention catches on their eyes. They might be a rich, earthy brown, a pale blue, or the rare green that shifts with every flicker of light. Eyes have a way of ...