#Color blind test for kids free professional
#Color blind test for kids free series

There is an easier explanation of the test. The colors of the tritan test are in the line of the purple-red confusion lines. The red-green colors are from the color space, where the confusion lines are quite the same for both types (protan and deutan), while the purple-blue and purple-green colors are quite sensitive to differentiate them. The colors used in the test are from the confusion lines.

The Colorlite color vision test uses this well-known phenomenon. It is much more than just red and green (deuteranopia/protanopia) or blue and yellow (tritanopia) that are indistinguishable from other colors. As shown in the diagrams, the whole color spectrum is drastically reduced for colorblind people. This is why the two types of colorblindness are grouped together as red-green deficiency.

Protanopia gets more horizontal towards the blues (this creates the different discretion in many colors between protans and deutans), but both color deficiency confusion lines are more vertically inclined towards the reds and greens. On this side of the color space, the confusion lines are pointed in approximately the same direction for both types. For both types of red-green color blindness (deuteranopia and protanopia) the biggest confusion between colors is in the axis between red and green. 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.

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.

Only a professional in a controlled environment can provide such a diagnosis. Keep in mind that this test is not a clinical diagnosis.

If you are using a monitor, the contrast should be at least 75% and the color temperature should be set to “warm”.Do not expose the screen to direct light (best in the dark or with minimal backlight).If you use any color filter settings (night mode, blue light filter, color blind filter) please turn it off!.Set the brightness of your device to maximum (but minimum 75%).Please perform at least the following screen calibration:.Remove any glasses with colored lenses.Online color blind tests are not suitable for clinical diagnosis! The colors of the printed books cannot be simulated by a display. Computer displays have only three primary colors. Please note that computer based color blindness tests do not give the same results as the original tests (example Ishihara, D15). *** - excellent test | ** good test with some limitations | * - poor diagnostic sensitivity Among our color blind tests, you will also find an online version of traditional color blind tests like Ishihara, Lantern, Farnsworth D15. The Colorlite color blind tests can determine a person’s type and level of color blindness. You can also test the color blindness of your kids. Colorlite online color blind tests help you identify red-green and blue (Tritan) color blindness.

#Color blind test for kids free series

#Color blind test for kids free professional