눈물막, or the tear film, is a thin layer of fluid that covers the surface of the eye. It is essential for maintaining eye health and comfort. The tear film consists of three layers: an outer lipid layer, a middle aqueous layer, and an inner mucin layer. These layers work together to keep the cornea moist, provide nutrients, and protect against infections. The tear film is produced by lacrimal glands and is continuously replenished. When the tear film is disrupted, it can lead to dry eye syndrome, causing discomfort and potential damage to the cornea. Maintaining a healthy tear film is crucial for clear vision and overall eye health.