Color vision has been an important part of the human visual function. It is determined by the phytochrome of cone. In many clinical cases of ocular fundus diseases, patients had color vision loss, which shows that color visions tests is necessary and meaningful. At present, doctors have not paid attention to it and adopt the tests rarely. The article summarizes the tests of color in common use and applications on the diagnosis and treatment for common ocular fundus diseases to be a theory basis.