When you stare at a colorful image and then turn to look at a neutral background, a "ghost image" appears in contrasting colors. Now, new research finds that a similar illusion occurs with shapes, ...

After viewing a colored figure on a uniform gray background, an observer will see a negative afterimage after the colored figure disappears. This study shows that the shapes of afterimages vary ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. When you stare at a colorful image and then turn to look at a neutral background, a "ghost image" ...