The eyes feel foggy with a film is clinically known as blurred vision, which may be due to eye fatigue caused by excessive eye use, close internal vision or prolonged gaze at electronic products, resulting in a transient blurring of the eyes, usually relieved by rest, massage around the eyes and looking into the distance. If the symptom exists for a long time, or has other accompanying symptoms, it may be due to disease: 1, refractive error: myopia, farsightedness and astigmatism may appear in the eyes feel foggy with a layer of film, in addition to this symptom, generally no other discomfort symptoms. The presence of refractive error can be clarified through optometry, such as indeed refractive error, can be corrected by wearing glasses (such as frame glasses, keratomileusis, corneal contact lenses, etc.) to alleviate, if necessary, can also be corrected by means of surgery, such as corneal refractive surgery, scleral refractive surgery and intraocular refractive surgery; 2, keratitis: such as improper cleaning and other reasons leading to bacteria, fungi, viruses, etc. The invasion of the eye may lead to the occurrence of keratitis, which can cause the eye to feel foggy with a layer of film, and can also be accompanied by red blood, redness, or white red symptoms, usually need to identify the causative agent after the selection of targeted drugs for treatment under the guidance of a professional doctor, commonly used drugs, including ofloxacin, gentamicin, miconazole, etc.; 3, uveitis: caused by pathogenic infection or autoimmune function abnormalities The eyes may feel foggy with layers of film, accompanied by photophobia, tearing, eye pain and other symptoms. The symptoms can be relieved by medication as prescribed by the doctor. Clinical ciliary muscle paralyzing agents are often used to prevent post-iris adhesions, such as atropine and post-matropine ointment or drops; glucocorticoid eye drops, such as dexamethasone acetate and hydrocortisone acetate, can also be used, combined with non-steroidal anti-inflammatory drugs such as diclofenac sodium drops for anti-inflammatory treatment; 4, cataracts: generally occur in older people, mostly due to aging, inflammation, tumors or physical injury It can be caused by aging, inflammation, tumor or physical damage, etc. It can appear that the eyes feel foggy with a layer of film, and is usually accompanied by symptoms such as decreased light sensitivity, glare and visual field defects. Treatment is mainly surgical, which requires removal of the cloudy lens and implantation of an IOL. For patients who cannot undergo surgery, there are no specific drugs available for clinical treatment, but oral nutritional drugs and topical drops of antioxidant drugs can be used to avoid aggravation of symptoms. There are layers of film, but also can be accompanied by severe headache, eye pain, nausea, vomiting and other symptoms. It can be treated with medications to lower intraocular pressure, such as Mao Guo Yunxin eye drops and levobunolol hydrochloride eye drops, under the guidance of a doctor, and can also be relieved by means of anti-glaucoma surgery.