Why do we need to blink?
Show answer & explanation
Answer: Spreading tears keeps eyes moist
Clearing static from eyelashes — Wrong. Blinking has nothing to do with static electricity. Its purpose is to spread tears across the eye surface, keeping it lubricated and removing debris.
Spreading tears keeps eyes moist ✓ — Correct! Blinking spreads tears across the eye's surface, keeping it moist and removing dust, debris, and dead cells. Without blinking, eyes would dry out and become damaged. We blink about 15-20 times per minute automatically.
Protecting from bright lights — Wrong. While closing eyes protects from bright light, that's not why we blink regularly. Blinking's main function is eye lubrication.