What is the function of eyelashes?

The function of eyelashes primarily serves as a protective mechanism for the eyes. They act as a barrier by catching dust, debris, and small particles before they can reach the surface of the eye, thereby helping to prevent irritation and injury. Additionally, eyelashes play a role in triggering the blink reflex, which further protects the eyes by closing them quickly when an object comes too close, reducing the risk of damage.

While the other options may touch on different aspects related to eye function or health, they do not accurately reflect the primary role of eyelashes. For instance, although eyelashes may contribute indirectly to visual function by keeping the eye clear of obstructions, their main purpose is undeniably protection.