Sudden watery fluctuations in the patient’s eyes are mostly seen in vitreous and retinal fundus diseases, such as retinal choroidal detachment, macular edema and vitreous liquefaction pulling. Because the macula on the retina is the most important part to receive external visual stimulation, so when the retina or its choroid lesion detachment or pulling and other impacts, the patient may appear in front of the eyes watery fluctuations, black shadow blocking feeling and other uncomfortable symptoms. When the patient’s eyes suddenly have watery fluctuations, which have obvious effects on the patient’s vision, special attention should be paid to alert the retina and choroidal detachment and other conditions. Patients can improve the fundus photography and other auxiliary examinations to clarify the cause of the disease, and can be treated through surgical treatment, laser treatment and other ways to improve the patient’s vision. It is recommended that patients with significant ocular discomfort should seek prompt medical attention to assess their condition and follow the doctor’s instructions for treatment.