Blinking

**Blinking (Nictitatio)** is a rhythmic contraction of the orbicularis oculi muscle that provides temporary subluminal protection of cells in the eye from UV radiation and mechanical irritation. The process of blinking occurs reflexively in response to irritation of the receptors of the ciliary body and semicircular muscles of the eye. **By covering the entire area of ​​the eyelids, we protect the cornea and conjunctiva from drying out and mechanical damage.** This is a vital process: it allows our brain to restore three-dimensional vision and maintain clarity of perception of the world around us. Blinking may indicate that a person is stressed, has tired eyes, or needs to sleep. If you blink too often or continue to blink after it has become inappropriate for you, this may be a symptom of dry eyes. Additionally, some people may experience dryness due to contact lens use or previous medical conditions.

**Is blinking normal or disease?** Forced blinking (saccades, blinks) is normal and can occur in response to bright external stimuli or when processing information. More frequent and intense blinking, for example, when reading in a quiet room, indicates a decrease in visual acuity. Typically, blinking refers to rapid and short-term movements of the eyeballs, but when you squint for a long time at the moment of sunset or sunrise, you can also notice slow movements - “swiping” the eyelids. If these movements are involuntary and are reduced due to various physiological factors, then you should consult a specialist for advice.