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The S-cones make up only 8–12 percent of all cones in the retina and are almost completely absent in the absolute center of the fovea.” Taken all together, this means some colors are easily ...

Optical illusions are taking over the internet. A favorite pastime for many, the popularity of brain teasers is on the rise. If you think you are quick at solving viral optical illusions, we have just ...

A biomedical optics engineer discovered a visual illusion where purple dots appear bluer in peripheral vision. This phenomenon highlights how our retinas' cone distribution and a yellow pigment layer ...

Optical illusion challenges keep people engaged in a fun way. These viral puzzles, designed to trick the eyes, force the brain to look twice before spotting the hidden detail. That mix of difficulty ...

Perception researchers have long known about the structural and functional features that differentiate our central vision from our peripheral vision. The central (or foveal) region of our retinas are ...