Once clinical symptoms of cloudy eyesight appear, it is important to pay attention to the fact that many pathological factors can lead to cloudy eyes, such as cataract, refractive error, macular degeneration, retinal vascular disease, vitamin deficiency, cardiovascular disease, etc. In young people, refractive error is the most important cause of blurred vision. Patients with myopia see distant objects more blurred. Patients with farsightedness see near objects cloudily and see distant objects clearly. For blurred vision caused by refractive error, it is recommended to go to the hospital for an optometric examination and to wear frames, contact lenses or undergo refractive surgery to improve the clinical manifestations of cloudy eyes. In the elderly, there is a high risk of cataracts, macular degeneration, and retinal vascular disease. All of these conditions will seriously affect vision if treatment is delayed. In addition, severe vitamin A deficiency in the patient’s body is also a cause of cloudy eyes. Vitamin A is a major nutrient for maintaining normal visual function, and a deficiency affects the production of optic rod cells, causing patients to develop nighttime eye clouding and night blindness. Vitamin A tablets can be taken to treat night blindness and help relieve the symptoms of cloudy eyes. Finally, some cardiovascular diseases can affect the blood supply to the eye tissue. The lack of blood supply affects the normal physiological function of the eyes, resulting in cloudy eyes. Active treatment of cardiovascular disease can help alleviate the symptoms of cloudy eyes. All in all, if there is significant eye cloudiness, it is recommended to go to the hospital for a comprehensive eye examination first, to discover the cause in time, to make a clear diagnosis, and to actively treat the cause to inhibit the progress of the disease in order to truly protect the visual function.