Blinking is a fascinating and vital function of the human body that often goes unnoticed despite its frequency and importance. On average, humans blink approximately 15-20 times per minute, amounting to over 28,000 times a day. This seemingly mundane action serves several critical purposes, ranging from protecting the eyes to maintaining optimal vision.
Protection and Hydration
One of the primary reasons for blinking is to protect the eyes from external irritants, such as dust, debris, and bright lights. The eyelids act as a shield, quickly closing to prevent foreign objects from entering and damaging the delicate structures within the eye. Additionally, blinking helps spread a thin layer of tears over the surface of the eye, keeping it moist and preventing dryness. This tear film contains three layers: an oily outer layer that prevents evaporation, a watery middle layer that nourishes and hydrates the eye, and a mucus inner layer that ensures the tear film adheres to the surface of the eye.https://whyblinking.com/
Cleaning and Lubrication
Each time we blink, our eyelids act like windshield wipers, cleaning the surface of the eye by removing small particles and debris that may have settled there. This action is crucial for maintaining clear vision and preventing infections. The tear film also contains enzymes and antibodies that help protect against bacteria and viruses, further enhancing the eye's defense mechanisms.
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