![]() ![]() ![]() Protanomaly Red weakness, red looks greener and less bright.Ībout 99% of all color blind people are red green colour blind. There was a middle-aged man with a mature and serious attitude who bought a red woolen sweater and ridiculed it after putting it on. Green is often regarded as yellow, purple is regarded as blue, and yellow and blue are mixed into white. The patient mainly cannot distinguish red, and cannot distinguish red from dark green, purplish red, and purple. Protanopia is also known as the No 1 colour blindness. When the lighting is poor, their color discrimination ability is close to red-green blindness but when the material color is deep, bright and the illumination is good, its color discrimination ability is close normal. They have poor sensitivity to red and green. The patient cannot distinguish between light green and dark red, purple and cyan, magenta and gray, and treats green as gray or dark black. If you suffer from any one of these, you may not be able to pass the color blindness test without utilizing specific strategies or devices.ĭeuteranopia is the most serious form of red-green color blindness. Yet, total color blindness, although rare, can lead to a complete failure in passing these testsĢ.There are four types of red-green color blindness. There exist certain apps and devices which aid people with such color vision deficiencies in passing the color blindness tests. The effectiveness of the tests can be found in “Learn more / Background information" section.1.The most common types of color blindness are red-green and blue-yellow. Negative predictivity: The probability of how many of the subjects diagnosed with normal color vision actually have normal color vision. Positive predictivity: The probability of how many of the subjects diagnosed with color blindness are actually color blind. In other words, it shows how reliably it diagnoses normal color vision. Specificity: The probability that a test will actually diagnose normal color vision in subjects with normal color vision. In other words, it shows how reliably it detects the existence of color blindness. ![]() Sensitivity: The probability that the test will actually diagnose color blindness in (true) color blind subjects. The effectiveness of the online color blind tests can be described as follows: If you are using a monitor, the contrast should be at least 75% and the color temperature should be set to “warm”.īackground information about the color blind testsĮfficiency of the online color blind tests.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). Important notes about online color blind tests Efficiency of the online color blind tests.Background information about the color blind tests.Important notes about online color blind tests. ![]()
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