Blinking is a natural and involuntary action that involves closing and opening the eyelids. This process helps to keep the surface of the eyes moist and clear of debris. Each blink lasts only a fraction of a second, and on average, a person blinks about 15 to 20 times per minute. The act of blinking also plays a role in protecting the eyes from irritants, such as dust or bright lights. Additionally, blinking can help to reset visual focus, allowing the eyes to adjust to different distances. Overall, blinking is essential for maintaining eye health and comfort.