Patients who experience the feeling of water ripples in front of their eyes may be due to vitreous liquefaction and tear film instability. 1. Vitreous liquefaction: Vitreous liquefaction lesions are related to myopia, aging and other factors, and generally become more and more serious with age. When vitreous body liquefaction occurs, it will cause the gel-like vitreous body to become watery, and with the shaking of the head, the patient may have the feeling of water ripples in front of the eyes. 2. Tear film instability: Tear film instability may be caused by dry eye or pathological changes in the corneal epithelium, resulting in the formation of an irregular tear film on the surface of the patient’s eyes, and the patient may experience discomfort such as a watery feeling in front of the eyes. It is recommended that patients who experience watery eyes that do not resolve over a long period of time should seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.