What is the primary function of tears?

The primary function of tears is to keep the eye moist and protect against infections. Tears are crucial for maintaining the health of the eyes, as they help to lubricate the surface, allowing for comfortable blinking and preventing dryness. Additionally, tears contain enzymes and antibodies that play a critical role in protecting the eyes from microbial infections, thus serving as a frontline defense against pathogens. This keeps the ocular surface healthy and helps maintain clear vision.

While vision correction, enhancing appearance, and providing nutrients are aspects related to eye health, they do not encompass the primary biological role that tears play. Moisture retention and protection against pathogens are essential for the eye's overall function and integrity.