An optical illusion is a visual phenomenon in which our perception of an image differs from objective reality. This image is ...

Glaucoma progresses silently and can cause permanent vision loss. Learn why awareness, regular eye exams, and timely care are ...

In the market for a used car? With used car prices still at historic highs, it’s more important than ever before to be ...

New research suggests that the emotional content of a facial expression influences how well observers can predict social outcomes. A series of experiments indicates that people have a harder time ...