Another benefit of blinking is to shield the eye from foreign bodies. Our eyelashes serve as dust-catchers, as the blinking reflex causes them automatically to lower, when exposed to harsh elements. Apparently, camels are endowed with extraordinary long, curly, eyelashes to protect their eyes from sudden sandstorms in the desert.
Eyebrows, by the way, also serve their purpose, as they catch the run-off perspiration produces. So, girls out there, don't shave or pluck your eyebrows too much! Let it serve its purpose!