Kyynelien

Kyynelien is a Finnish word that translates to "tears" in English. It refers to the fluid secreted by the lacrimal glands, located in the upper outer portion of each eye socket. This fluid serves several vital functions for ocular health.

Tears are composed of water, electrolytes, proteins, lipids, and antibodies. Their primary role is to lubricate the surface of the eye, preventing dryness and irritation. This lubrication is essential for comfortable vision, allowing the eyelids to glide smoothly over the cornea. Tears also wash away debris and foreign particles, helping to keep the eye clean and free from infection. The antibodies and enzymes present in tears provide a defense mechanism against pathogens.

Tears can be produced in three main ways: basal, reflex, and emotional. Basal tears are continuously secreted to maintain lubrication. Reflex tears are produced in response to irritants such as smoke, dust, or onions, helping to flush them away. Emotional tears are a response to strong feelings, both positive and negative, such as sadness, joy, or anger. The exact physiological mechanisms behind emotional tearing are still being researched, but it is believed to involve the activation of specific brain regions and the autonomic nervous system. The composition of emotional tears can differ slightly from basal and reflex tears.