Black spots at the white of the eye are usually caused by the following reasons: First, conjunctival foreign bodies, such as those engaged in cutting, welding, welding slag, iron filings, etc., are easily splashed into the eye without protective glasses, forming conjunctival foreign bodies, which need to be removed from the hospital ophthalmology as soon as possible. Secondly, conjunctival pigmented nevus or scleral pigmented nevus is considered to be caused by conjunctival pigmented nevus, which is located in the surface layer of white eye and can be displaced by gently pushing with fingers, while scleral pigmented nevus is located in the deeper layer of white eye and will not move when pushed with fingers, both of which are formed by the accumulation of excessive local cell pigment production and are not harmful. Thirdly, when blood vessels penetrate the sclera, the local scleral membrane tissue becomes thin and the color of blood vessels and blood is transmitted to form black spots, which is a normal physiological phenomenon and does not need to be treated.