silmapekslemist

Silmapekslemist, also known as blinking, is a rapid, involuntary or voluntary closing and opening of the eyelids. This fundamental physiological reflex plays a crucial role in maintaining the health and function of the eyes. The primary purpose of blinking is to spread tears evenly across the surface of the cornea, the transparent outer layer of the eye. This lubrication is essential for preventing dryness, irritation, and damage. Tears also contain antibodies and enzymes that help to protect the eye from infection and wash away small foreign particles.

The blinking reflex is triggered by a variety of stimuli. Sensory receptors in the cornea detect dryness, foreign bodies, or even bright light, sending signals to the brain that initiate a blink. Involuntary blinking occurs at a regular frequency, typically around 15-20 times per minute in adults, though this rate can vary depending on factors such as fatigue, concentration, and environmental conditions. When we are focused on tasks like reading or using a computer, our blink rate often decreases, which can lead to dry eyes. Voluntary blinking allows us to control the action consciously, for example, to clear an irritant or as a form of communication. While seemingly simple, blinking is a vital process that contributes significantly to clear vision and ocular comfort.