Brain cells that produce dopamine are reportedly responsible for blinking, which has the function of keeping the eyes moist and cleaning the corneal surface. And when the brain loses these cells against the background of decreased dopamine levels, the frequency of blinking decreases. Moreover, the normal blinking frequency is 14-17 times.
And if someone’s eyelids close less often, this indicates the possible development of pathology of the central nervous system – Parkinson’s disease. And this can happen without the development of obvious tremors.
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Source: Ferra
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