Dragging mosquito shadow in the eye with lightning on the right is considered to be related to trauma, flying mosquito syndrome, retinal detachment and other conditions. 1. Trauma: If the patient’s eyes are hit by external forces, such as car accidents as well as boxing, which cause fundus injuries such as retinal detachment and fissure, the patient can have phenomena such as gold stars, lightning and black shadows inside the eyes. 2. Flying Mosquito Syndrome: Typical symptoms are small black shadows appearing in front of the eyes when looking at something, and the black shadows are more obvious in front of a white background. It may be accompanied by flashing sensation, loss of vision, blocked vision, black shadow shaking and other phenomena. The main causes of FMS are vitreous clouding and uveitis. 3. Retinal detachment: If the patient has retinal detachment, there may be unilateral or bilateral blurring of the visual field of the eyes, flickering sensation in the eyes, floating objects and other symptoms. It is recommended that the patient should consult a doctor in time to get a clear diagnosis and follow the doctor’s instructions for active treatment, so as not to delay the condition.