Blinking is a natural and involuntary action that involves closing and opening the eyelids. This process helps to keep the eyes moist and clear of debris, protecting them from irritation. On average, a person blinks about 15 to 20 times per minute, which can vary based on factors like concentration and environmental conditions. The act of blinking is controlled by the brain and involves several muscles around the eyes. Blinking also plays a role in communication, as it can convey emotions or reactions. Additionally, it serves as a brief moment of rest for the visual system, allowing the eyes to recover from visual strain.