An afterimage is a visual phenomenon that occurs when a person continues to see an image even after the original stimulus has been removed. This effect happens due to the temporary retention of visual information in the eye and brain, particularly in the retina. Afterimages can be positive, where the colors remain the same, or negative, where the colors are inverted. Afterimages are often experienced after staring at a bright object, such as a light bulb or a colorful image, for an extended period. When the eyes shift to a neutral background, the afterimage can appear, demonstrating how our visual system processes and retains information.