The presence of black patches in the white of the eye is generally considered to be the cause of nevus of conjunctiva, melanoma, and foreign objects entering the white of the eye, etc. Patients can follow the doctor’s instructions to perform surgical treatment, radiation therapy, and so on. 1. Conjunctival nevus of pigment: Conjunctival nevus of pigment can occur near the cornea and eyelid fissure part of the bulbar conjunctiva, usually black, with varying shades of pigmentation, this is a kind of benign tumor, which does not affect the aesthetics of the premise of the general does not need treatment. If the surface becomes rough and the plaque becomes bigger, it is considered to have the possibility of malignant transformation, so it is necessary to go to the hospital for treatment in time and do surgery to remove it to prevent further malignant transformation. 2. Melanoma: melanocyte malignant tumor, the specific cause is not clear, ultraviolet exposure, family history of the population is more likely to suffer from the disease, in this case, the patient’s eye white black plaque at the same time there will be accompanied by blurred vision, pupil shape change and other symptoms, the treatment method for most of the surgical treatment to remove, but also can be used for radiation therapy. 3. Foreign body into the white of the eye: when the outside world black foreign body into the white of the eye, will also be manifested in the white of the eye with black patches, then if the foreign body in the white of the eye surface, you can use water to flush, but if the location of the deeper, it is recommended to go to the hospital under the guidance of a professional doctor to carry out the foreign body removal surgery. It is recommended that patients with black patches on the whites of the eyes consult a hospital in time to assess their condition and follow the doctor’s instructions for treatment.