silmänräpäytyksen

Silmänräpäytys is the Finnish word for blinking. Blinking is a rapid, involuntary closing and opening of the eyelids. It is a natural reflex that serves several important functions for the eyes.

The primary purpose of blinking is to keep the eyes moist and clean. Each blink spreads a thin layer of tears across the surface of the eye, known as the tear film. This tear film lubricates the cornea, preventing it from drying out, and washes away small particles of dust, debris, and other foreign matter. The blinking action also helps to remove irritants and can even be a response to sudden bright lights or the threat of impact.

The frequency of blinking can vary depending on several factors. Generally, people blink around 15 to 20 times per minute. This rate can increase when a person is tired, stressed, or experiencing dry eyes. Conversely, it can decrease when concentrating intensely, such as while reading or using a computer. Certain medical conditions can also affect blinking rates.

Blinking is controlled by complex neural pathways involving the brainstem. It is an essential reflex for maintaining ocular health and visual comfort.