The symptoms can be extremely variable, causing anything from mild irritation to severe discomfort; including:
– Foreign body sensation/feels like something is in the eyes
– Eyes feel â€˜grittyâ€™ â€“ often worse in the mornings
– Blurred vision
– Burning sensation in eyes
– Irritable eyelids
– Light sensitivity
– Redness of the whites of the eyes
– Painful eyes
– Excessive watering
In Dry Eyes, why do the eyes sometime water excessively? How can the eyes be dry if they are watering all the time? This is a paradox which is explained as follows.
Blinking spreads a tear film over the surface of the eye â€“ the eyelids do the opposite to what a windscreen wiper does on a car. The eyelids spread a thin film of tears over the front of the eye.
When there are not enough tears, or if the quality of tears is poor, the surface of the eye becomes dry, and this causes inflammation. Special receptors on the surface of the eye are then stimulated by this inflammation, which causes a â€˜reflex tear productionâ€™. This leads to the main tear glands to literally â€˜switching the tap onâ€™ in an attempt to wet the dry surface. The result is often the production of excessive watery tears ( as opposed to oily tears) which results in watering of the eyes.