Sudden appearance of watery eyes. It may be caused by vitreous clouding, retinal pull or insufficient blood supply to the fundus. 1. Vitreous clouding: due to age, inflammation, fundus hemorrhage and other causes of vitreous clouding, the normal refractive state of the eye is impaired, which is manifested in the sense of watery ripples in vision, you can check whether the refractive medium is clouding through the slit lamp. 2. Retinal pulling: when vitreous liquefaction, retinal degeneration and other causes lead to retinal pulling, a transient watery rippling sensation in front of the eyes may occur, and in serious cases, retinal cracks may occur, which will have a greater impact on vision. 3. Insufficient blood supply to the fundus: when the arteriovenous obstruction of the fundus causes insufficient blood supply to the fundus, the function of retinal photoreceptor cells is impaired, and the direction of water ripples in the eyes usually corresponds to the ischemic area, which suggests fundus vascular disease. When water ripples appear in front of the eyes, it is recommended to go to the hospital in time for slit lamp examination, eye ultrasound, brain imaging and other examinations to find the cause of the disease, and then enter the treatment for the cause of the disease.