Color blindness is a hereditary condition. It is usually passed on from the mother, who passes the defective gene, to the child. Color blindness usually varies in degrees. It can be a partial condition or complete color blindness. A person, who is completely color blind, may not be able to see any color at all, and everything looks gray to them.
Whereas a person, who is suffering from partial color blindness, can identify certain solid colors, but will have a problem in grading and also identifying color variants. In order to be able to tell the degree of color blindness, one has to use a color chart.
There are several charts and tools that can identify color blindness. Many tools use red and green as basic color to determine the degree of color blindness. For green, the variations of green colors are used, and for red, the variations of red are used. Both are solid colors. The color blindness chart typically asks you to match the colors and see if they merge. You can get these tools on the internet also. You can take an online color blindness test.
The mostly popular tool used to test color blindness is called anomaloscope, and it is also one of the most accurate tools. It works using the color match options. The tool asks you to identify the colors that have two different light sources. The two colors have to be matched to the same source. A computer-based anomalaoscope may differ from the actual one because the gradation of colors differs.
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