C1 license renewal physical examination if color weakness can wear color weakness correction glasses, under sufficient light conditions for the examination. Whether color weakness or myopia, driving license physical examination allows wearing glasses, so patients with color weakness can go to professional stores to purchase corrective glasses, which can improve the perception of color contrast for color weakness patients; during the examination, the more sufficient the light, the more saturated the colors will be, and the easier it will be for people with color weakness to recognize colors. According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses", the physical examination for license renewal only requires that the applicant does not have red-green color blindness, there is no restriction on red-green color weakness, and the examination does not include items for color weakness detection. Color weakness, also known as color vision deficiency, can be understood as mild color blindness where colors can be recognized but with lower sensitivity. The most intuitive difference between the two is that color blindness cannot recognize colors, while color weakness only has poor color recognition ability, and can only clearly see colors when they are relatively saturated. The most common are red weakness (type A) and green weakness (type B), while blue weakness is extremely rare.
