Why can't i see the afterimage?

You might not see an afterimage due to various factors, such as lighting conditions, the duration of the initial visual stimulus, or the health of your retinas. Afterimages occur when the photoreceptors in your eyes become overstimulated and then respond less to light after the stimulus is removed. If the contrast between the stimulus and the background is low, or if you quickly shift your gaze or close your eyes, the afterimage may not be perceived. Additionally, individual differences in visual processing can also play a role.