There are different reasons why the eyes blink. It is normal for us to blink our eyes because it is a reflex action, which means the body does it automatically. But in some cases, the eyes blink excessively, which indicates an underlying condition.
Every time we blink our eyes, the eyelids spread a mucosa secretion to the surface of the eye. This helps to prevent the eye from drying. Blinking also keeps them from damaging stimuli like light, dirt, and other foreign bodies.
Sometimes when we notice excessive blinking, it can be related to stress, fatigue, and anxiety. When the eye blinking continues even after rest, it is an indication that there is a condition occurring in the nervous system: Blepharospasm, a condition characterized by rapid uncontrolled blinking and uncontrolled eye closure.