IPOLAC

The term "Dry eye" describes a number of conditions that have the alteration of the tear film, the thin layer of tears that lubricate, nourish and protect the ocular surface, in common. In some cases, it may be caused by immune or hormonal disorders, the use of contact lenses or by taking certain medications.
The most common symptoms are dry and tired eyes, a feeling of heaviness of the eyelids, and pressure on the eyes, burning, itching, feeling of a foreign body, sensitivity to light and blurred vision. Irritation of the eye surface caused by dry eyes may occur with red, and reflex tearing. The symptoms may increase during the night and upon waking, because during sleep secretion of tears is reduced. Even some activities or habits such as prolonged use of computer, wearing contact lenses, staying in air-conditioned environments or near sources of heat may worsen the symptoms.