The appearance of black spots on the eye belongs to pigmentation, which is usually caused by pigmented nevus or residual pigmentation from local scarring. 1. Pigmented nevus: If the pigmentation is inside the eye, it is mostly due to a small amount of pigment deposited in different locations of the eye, which can be followed up and observed, and most of the time it will not affect the vision. 2. Local scarring residue: If there has been previous injury or trauma to the eye, scar pigment may form after local wound healing, leading to the appearance of black spots; in addition, it may also be accompanied by vision loss, visual field defects and other clinical manifestations. When you find a black spot on the eye, do not be too alarmed, it is best to go to the hospital as soon as possible, for professional and standardized treatment.