Soothe irritation
Eye irritation is extremely common and it happens to us most days.
Mr Longhurst said: “Reflex tears contain mostly water and are released when something irritates our eyes, such as the wind, smoke, or cutting onions.
“If you have a watery eye in the absence of an irritant, it is best to see your optician.”
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Prevent infections
Eye infections such as conjunctivitis and blepharitis are often caused by bacteria, viruses and allergens.
The advice for treating lots of common eye infections is simply to keep it clean while it heals itself because your tears can help to fix the problem.
Mr Longhurst said: “Basal tears contain an enzyme called lysozyme, which is antimicrobial and protects your eyes from infection!”
Source: Daily Express