The tear film is a thin layer of liquid that covers the surface of the eye, providing moisture and protection. It is composed of three main layers: the outer lipid layer, the middle aqueous layer, and the inner mucin layer. This film helps to keep the eyes lubricated, reduces friction during blinking, and washes away debris and irritants. The tear film is essential for maintaining clear vision and overall eye health. When the tear film is disrupted, it can lead to conditions like dry eye syndrome, which can cause discomfort and vision problems. Regular blinking helps to spread the tear film evenly across the eye surface.