5.5.2025
Blinking is an inconspicuous movement at first glance, but it is essential for eye health. It ensures an even distribution of the tear film, protects the cornea and conjunctiva and helps to drain tears into the tear ducts. And although we blink automatically, in some situations the frequency of blinking can drop – and that’s not ideal for eyesight.
We blink up to four times a second – but not always
“Physiologically, we blink every three to six seconds. The lacrimal glands produce about one millilitre of tears a day,” explains Pavel Stodůlka, head of the Gemini eye clinic network. The tear film has several functions – it is the first optical interface of the eye, it washes its surface, protects it and also has antibacterial effects.
Interestingly, women blink more often than men. Hormonal changes, such as those caused by the use of hormonal contraceptives, can affect the stability of the tear film and result in more frequent blinking.
Computers and stress reduce blinking
We naturally blink less – up to five times less than normal – when we’re on the computer, concentrating or stressed. “The surface of the eye suffers as a result, because the necessary moistening by tears does not take place. It is therefore necessary to consciously blink the eyes regularly,” Stodůlka recommends.
Ageing and disease reduce eyelid mobility
As we age, tear production decreases, as does the activity of the facial muscles. This can also affect the activity of the muscles responsible for blinking. “Certain neurological disorders, such as Parkinson’s disease, are associated with reduced blinking frequency and can significantly affect the eyes,” adds Anna Varsami, a doctor at Gemini Eye Clinic.
Blinking can also be impaired due to accidents or congenital developmental defects – for example, when a person is born without eyelids. If the eyelid is lost as a result of an accident, it is necessary to protect the ocular surface with lubricants or surgical intervention.
Blinking can be practised
The good news is that proper blinking can be trained – especially appreciated by people with dry eyes, patients with neurological conditions or those who spend hours in front of a screen.
“Deliberately blink more often, especially when working on the computer. Every 30 minutes, close your eyes for two to three seconds, then blink slowly a few times. Also, look regularly at an object at least six metres away, while deliberately blinking slowly. A gentle massage of the closed eyelids for 30 seconds, two to three times a day, also helps,” concludes Pavel Stodůlka.
