Patients feel that there is a layer of film in their eyes, which may be caused by refractive error without correction, dry eye disease, iritis and other reasons. 1. Uncorrected refractive error: When astigmatism is not corrected in time, it will lead to a gradual decrease in vision and symptoms such as swelling and pain in the eyes. At the same time, it will also lead to the discomfort of something blocking the patient’s eyes. 2. Dry eye: dry eye patients because of the decline in the secretion function of the tear gland, the proportion of fat in the composition of tears increased, resulting in a layer of oily film, which leads to a layer of film in front of the eyes blocking the feeling. 3. Iritis: Iritis will not only lead to the sensation of a film blocking the eyes, but also lead to redness, photophobia, vision loss, pain and other symptoms. 4. Other: eye diseases such as keratitis, uveitis, retinal detachment, etc., can lead to a layer of film floating in front of the patient’s eyes. In addition, the patient will also be accompanied by dark vision, vision loss and other symptoms. It is recommended that patients with visual abnormalities seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment. When you feel a film in front of your eyes, it is recommended that you visit an ophthalmologist to get a clear diagnosis so that you can get the right treatment.