What property of tears helps keep the cornea clear?

The property of tears that helps keep the cornea clear is their hydrophilic characteristics. Tears are composed primarily of water, electrolytes, proteins, and lipids, which combine to maintain an optimal hydration level of the cornea. This hydrophilic nature ensures that the cornea remains moist, which is vital for maintaining transparency and preventing clouding. When the cornea is adequately hydrated by these hydrophilic components of tears, it can effectively transport nutrients and remove waste products, further contributing to its clarity.

Additionally, the hydrophilic characteristics of tears promote a stable tear film on the surface of the cornea, which is critical for eye comfort and proper vision. A stable tear film also protects the corneal epithelial cells from drying out and facilitates the healing of any microtrauma that may occur to the eye surface. Thus, the hydrophilic properties of tears are essential for maintaining corneal health and clarity.