Color weakness can be treated symptomatically with corrective lenses for color weakness, which can improve color discrimination to some extent, but cannot cure it. Color vision is a visual phenomenon in which the ability to discriminate colors is weak. The clinical manifestations are: poor color discrimination, the ability to distinguish colors only when they are more saturated, or the ability to distinguish changes in hue only when there is a large difference in wavelength. Red weakness and green weakness are more common, while blue weakness is rare. Red weakness has a poor ability to discriminate red; green weakness has a poor ability to discriminate green, and patients have difficulty recognizing, misreading, or failing to read a pseudo-cochrogram when it is examined. The majority of chromatic weaknesses are congenital X-chromosome chain recessive disorders, and the patients are mostly male. A small number of acquired color vision abnormalities are seen in certain fundus diseases. The principle is: according to the principle of complementary color topography, special coating is applied on the lens to selectively allow the light of certain wavelengths to pass through, and wearing color vision correction glasses can make the original color that is not recognized correctly, and achieve the effect of correcting color vision disorder. Therefore, patients with color deficiency can improve their symptoms after wearing color deficiency corrective glasses, but they cannot be cured.