 Only 29% of cerebral achromatopsia patients successfully pass the Ishihara plate test, which is a more accepted and more standardized test for color blindness.The most apparent distinguishing characteristic between congenital achromatopsia and cerebral achromatopsia is the sudden onset of color vision loss following a severe head injury or damage to the occipital lobe following a stroke or similar ischemic event.Non-invasive imaging techniques can be the most helpful in determining whether the area of damage following a traumatic event is an correlated with color-vision processing.