Acquired color blindness is also known as acquired color blindness, which is mainly secondary to retinal or optic nerve diseases, such as retinal detachment, macular fissure, macular anterior membrane or retinitis, optic neuritis and so on. Therefore, if color blindness occurs later, you need to go to the hospital as soon as possible to improve the fundus examination, including visual acuity examination, optic nerve fiber layer analysis, visual field examination, etc. Through these examinations, we can find out the cause of color blindness as soon as possible, and treat the disease according to the specific cause, so that the color vision can be restored to normal as much as possible. If this disease is treated in time, it is possible to recover, but if the delay is particularly long, the possibility of recovery will become smaller and smaller.