Cerebral achromatopsia is when an individual does not have the ability to visually perceive different colors or hues. This is caused by damage to the area of the brain known as the visual association cortex. Sufferers can see objects clearly as it is only the color perception that is disrupted. Their visual field appears as if it is a black and white movie. Sometimes if the brain damage is unilateral the lack of color will only appear on one side of the visual field. Individuals with cerebral achromatopsia cannot recall what colors looked like before their brain damage and are unable to visualize mentally what colors look like.