It has been estimated that worldwide we have 40 million people with dry eyes worldwide. At least 16 million people have chronic dry eye syndrome in United States. With the introduction of computing and mobile phone devices, we expect chronic dry eye cases to increase over exponentially over the next 10-15 years.
Severe dry eye is relatively common within the United States, especially so in older people. . Specifically, the persons most likely to be affected by dry eyes are those aged 40 or older.
While persons with autoimmune diseases have a high likelihood of having dry eyes, most persons with dry eyes do not have an autoimmune disease. Instances of Sjogren syndrome and dry eyes associated with it are present much more commonly in women, with a ratio of 9:1. In addition, milder forms of dry eyes also are more common in women. This is partly because hormonal changes, such as those that occur in pregnancy, menstruation, and menopause, can decrease tear production.
In areas of the world where malnutrition is common, vitamin A deficiency is a common cause. This is rare in the United States.
Racial predilections do not exist for this disease