Parents can use toys of different colors or color-blind charts for children to differentiate and see if they can accurately represent or distinguish between these colors. If a child is colorblind, he or she will not be able to see colors that a normal person can see.
Red-green color blindness is associated with congenital inheritance, and acquired infections can be caused by diseases of the macula, retina, optic nerve, and occipital cortex, or drug toxicity.
1. Red blindness: children cannot distinguish red from dark green, blue from fuchsia and purple. Often see green as yellow and purple as blue.
2. Green blindness: Children are unable to distinguish light green from dark red, purple from cyan. See green as gray or dark black.
The most scientific way to determine red-green color blindness is to go to a professional ophthalmologist and confirm with a color blindness chart. After passing a screening such as the color blindness card, an accurate judgment can be made.