Sudden blurring of the eyes may be related to hypoglycemia, or it may be caused by retinal artery blockage and vitreous blood accumulation. 1. Hypoglycemia: When hypoglycemia occurs, resulting in the brain not being able to get enough energy supply, it may cause the patient’s eyes to be suddenly blurred, and may also be accompanied by weakness, panic and other uncomfortable symptoms. 2. Retinal artery blockage: due to the blockage of arterial blood flow in the retina, the retina, central artery, small arteries and branch arteries can be involved, which can cause patients to suddenly lose their eyesight, and may show sudden blurring of the eyes, or even cause sudden loss of vision. 3. Vitreous hemorrhage: usually caused by various factors, the retina, choroid blood vessel rupture, blood into the vitreous cavity, interfering with the entry of light into the eye, the patient may experience sudden blurring of the eyes, may be accompanied by mosquito sensation in front of the eyes, field of vision blockage and other uncomfortable symptoms. It is recommended that patients with sudden blurring of the eyes that does not resolve for a long period of time should consult a doctor promptly to assess their condition and follow the doctor’s instructions for treatment.