• Basal tears coat your eyes on a day-to-day basis to keep to keep them moist. Blinking throughout the day spreads tears across the surface of the eyes so they stay clean and comfortable. In a 24-hour period, you produce about 1 gram of basal tears; this rate slows with age.
• Reflex tears are the eye’s response to irritants; onions, wind, pollen, dust, etc. Reflex tears protect and soothe the eyes by was…hing away irritants.
• Emotional or psychic tears are caused by extreme emotions; happiness, sadness, even intense humor. Emotional tears can be accompanied by sobbing, coughing, irregular breathing, and runny nose. Emotional tears have a different chemical make-up than basal or reflex; they contain more protein-based hormones.
Tears are produced by lacrimal glands located between the upper lid and brow of each eye.
No matter the type of tears, over-production causes the eyes to overflow and tears to run down your face.
The under-production of tears can lead to eye discomfort and dry-eye syndrome.