The with red lines corresponds to protanopia (“red” blindness), the green lines to deuteranopia (“green” blindness), and the blue lines to tritanopia (“blue” blindness). Based on the color of its lines, each diagram corresponds to one of the three main color vision deficiencies. The colors in the directions of the lines may be hard for them to discriminate from one another. The diagrams below demonstrate the colors that tend to be problematic for colorblind people.
Scientific background of the color blind test
If both of these numbers are equal but you have a red-green deficiency (as determined by the first image series) then you may have a deutan color deficiency. If the purple-green number is greater than the purple blue number, than you may have a protan color deficiency. Also, if the purple-blue number is greater than the purple-green number than you may have a deutan color deficiency. For example, if you get 14 out of 14 right, you have normal color vision, 1 - 5 right is severe, 6 - 10 is moderate, and 11 or 12 is mild color vision deficiency.
#All lantern ring colors series#
The number of the first image in the second or third series that you cannot distinguish the gap in represents the severity of color deficiency. These determine if you have a green deficiency (deutan). The third series contains purple-green images. These determine if you have a red deficiency (protan). The second series contains purple-blue testing images. If you do, the second and third series determine which type of red-green deficiency and its severity. The first series determines if you have a red-green deficiency. The test contains three series of images. The goal of this test is to find where the gap is located in the “C shape” (known as a “Landolt Ring”) and to click on it.
#All lantern ring colors professional#
Only a professional in a controlled environment can provide such a diagnosis. Keep in mind that this test is not a clinical diagnosis.
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