How the rainbow looks to a person with deuteranopia
This Wikipedia page has some great graphics that give examples of what your colorblind child sees. (See the link at the bottom of excerpt, or click on the image at right.) Although it’s not the most scientific method, you can also see a similar effect if you have a TV with composite color (a red channel, a green channel, and a blue channel.) If your TV will let you, unplug one of the colors and watch for a while. My TV won’t work without the green channel connected, but it will still work with the others unplugged.
Based on clinical appearance, color blindness may be described as total or partial. Total color blindness is much less common than partial color blindness.[7] There are two major types of color blindness: those who have difficulty distinguishing between red and green, and those who have difficulty distinguishing between blue and yellow.[8][9]
