The eyes are hazy as if there is a layer of membrane to consider with bad habits, keratitis, refractive error, cataract and so on. 1. Bad habits: eye fatigue caused by looking at cell phones or computers for a long time at close range, or sleeping on the table can cause temporary deformation of the cornea, which can cause transient blurred vision. 2. Keratitis: corneal infection caused by bacteria, viruses and other pathogens can cause corneal edema, turbidity, or scar formation can appear blurred vision, hazy eyes. 3. Refractive error: When refractive error such as myopia, hyperopia or astigmatism occurs, there will also be a hazy feeling in the eyes, but not accompanied by other symptoms. 4. Cataracts: usually occurring in the elderly, due to age, hormonal drugs, trauma, etc., resulting in clouding of the lens, which is manifested as blurred vision and vision loss. Hazy eyes seem to have a layer of membrane, may also be related to other reasons, it is recommended to consult a doctor in a timely manner to clarify the cause, and standardized treatment under the guidance of the doctor.