The eyes feel foggy with layers of film, often due to corneal scarring, glaucoma syndrome, cataract, uveitis, glaucoma, vitreous turbidity, etc. Patients are advised to go to the hospital ophthalmology clinic in a timely manner, and treat the cause after a clear diagnosis through intraocular pressure examination, visual field examination, CT, etc. 1. Corneal scarring: patients with previous keratitis or corneal ulcers may be left with different degrees of This leads to a foggy feeling in front of the patient’s eyes; 2. glaucoma syndrome: it is a special form of anterior uveitis with glaucoma, and patients are mostly young adults aged 20-50. At the beginning of the disease, it has an impact on vision, and patients may have blurred vision in front of their eyes and a foggy feeling. 3. Cataract: It is very common in the elderly, and the density of the lens gradually increases with age, which leads to blurred vision in patients. In addition to age, trauma, systemic metabolic factors or radioactive factors can lead to lens clouding, resulting in blurred vision, a foggy feeling and a self-perceived film. 4. Uveitis: refers to the inflammation of the uvea itself, and the causes include infection and autoimmune factors. When uveitis attacks, patients show symptoms such as blurred vision, photophobia, eye pain, and eye congestion; 5. Glaucoma: due to congenital or acquired causes, the circulation of atrial fluid in the eye is blocked, which leads to an increase in intraocular pressure and causes damage to the optic nerve. When glaucoma is in the aura stage, patients can show sudden foggy vision, which may be accompanied by frontal pain on the affected side and can be relieved by itself after rest. When the acute attack, patients show symptoms such as eye swelling and pain, significant loss of vision, eye congestion; 6, vitreous clouding: common in the elderly vitreous degeneration, due to retinal or uveal hemorrhage into the vitreous, high myopia and other reasons, patients can show floating objects in front of the eyes, or foggy feeling; 7, other eye diseases: macular degeneration, keratitis, iridocyclitis and many other eye diseases All of them can cause different degrees of eye discomfort, making patients feel foggy when looking at things, with layers of film in front of their eyes. Need to actively seek medical attention to clarify the cause of the disease, reasonable treatment and treatment.