1. Basal Tears
Basal tears provide front line protection for your eyes.
They are present all the time to lubricate, sustain and protect your cornea.
These tears act as a constant barrier between your eyes and the outside world, shielding them from dirt and debris.
2. Reflex Tears
Reflex tears come to the rescue when your eyes need to flush away harmful irritants, foreign materials or onion fumes.
They are released in larger amounts than basal tears and may contain more antibodies to help fight bacteria.
3. Emotional tears
Emotional tears are generated in response to feelings of fear, sadness and even happiness.
Some scientists theorize that emotional tears contain additional hormones and proteins not found in basal or reflex tears. (ALcon- a Novartis Division)
1. You develop lesser tears as you get old
2. How tears are developed
Lacrimal glands above each eye produce your tears.
As you blink, tears spread across the surface of the eye.
Then the tears drain into puncta, tiny holes in the corners of your upper and lower eyelids.
Your tears then travel through small canals in the lids and down a duct before emptying into your nose.
There, tears will either evaporate or be reabsorbed.
3. Tears are in layers;
• Inner mucus layer
• Watery middle layer
• Outer oily layer. (AMERICAN ACADEMY OF OPHTHAMOLOGY)