The Science Behind Tears: Ophthalmologists Explain the Reasons
Ophthalmologists explain the science behind crying and the bodily processes involved. There are two components of crying: tears and verbal expressions of distress. Emotional tears, unique to humans, are triggered by strong emotions or intense situations. Tears are made up of salt water, mucus, and oil, and there are three types: basal tears for lubrication, reflex tears to wash away irritants, and emotional tears in response to emotional arousal. Crying can occur not only in sadness but also in happiness or relief. Excessive tears may indicate dry eye syndrome, which can be caused by hormonal changes, contact lenses, or certain medications.