Dry eye is a condition that occurs when there is not enough tears to keep the eye moist and comfortable, or when, despite having the right amount, the normal characteristics of the tears are not maintained so that they remain attached to the eye. eye, which causes them to evaporate very easily. Dry eye is one of the most frequent diseases of the modern world and more in the big cities. It can be caused by local emotional, immunological and inflammatory changes affecting the tear glands or palpebral glands or by systemic diseases such as arthritis, thyroid disorders or other hormonal disorders, Sjogren's Syndrome; the use of some medications such as antidepressants, antihistamines, anticholinergics, some diuretics and antihypertensives, eye disorders such as conjunctivachalasis (redundant conjunctiva), the presence of scarring or disorders of the eyelids and their position, etc. It is also important to know that very often it can be associated with the use of computers and air conditioning. Therefore, it is essential to have an adequate diagnostic suspicion that allows complementary studies that lead to an adequate treatment according to the cause and the compromise found.