To learn more about these read below.
'Basal tears' are constant tears, which stop our eyes from drying out.
The basal tears only pause when we sleep, then begin again when we wake.
The human body produces an average of 1.2 ml of these continuous basal tears each day.
These tears drain through the nose, through the nasal cavity.
'Reflex tears' are are tears that help to protect the human eye from harsh irritants such as smoke, onions, or a strong dusty wind.
For 'reflex tears' to be triggered by an irritant, the sensory nerves in your cornea let your brain know that there is an irritation.
The sensory nerves then transmit this information through impulses which are messages to the eye that tell it to produce tears.
These reflex tears then work to clear the eye of the irritant.
'Emotional tears' are tears stimulated by our emotions and triggered by activity in the brain.
Examples of emotions that might trigger tears are: