Dry eye syndrome (keratoconjunctivitis sicca or keratitis sicca) is a chronic lack of lubricant and moisture on the surface of the eye. It can occur with as a result of aging as fewer tears are produced as we age. Tears lubricate the front of the eye and they allow the eyelids to slide up and down the eye without friction as we blink. When the tear sac doesn’t produce enough tears, this causes friction as the eyelid constantly rubs off the eyeball and results in the condition known as 'dry eye syndrome'
 
Find out more about symptoms of dry eye.

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