How to detect color weakness

Color weakness can be detected by chromatogram test, chess piece arrangement, color bundle test, color mixing tester, etc. 1. Chromatogram test The examinee can identify the pattern on a professional chromatogram chart under the guidance of a doctor, under natural light. It is normal to think more if you can accurately identify it. If you cannot accurately identify it, there may be color weakness. 2. Chess piece arrangement can give the patient a special device similar to chess pieces, the number is 15, the color is gradient color, if the detected person can arrange the 15 chess pieces from light to deep or from deep to light, it indicates that there is no color weakness, if the arrangement is not, it indicates that there is color weakness. 3. Color bundle test will be different colors and shades of wool bundle mixed together, so that the detected person pick out the same as the standard bundle of wool bundle, if can accurately pick out usually said to be normal, if not accurately picked out, there may be weak color. 4. Color mixing detector Color mixing detector is a kind of spectral instrument made of the principle of red, green and yellow, which can quantitatively record the amount required for red and green matching, so as to detect whether the patient has weak color.