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In 1933, the Swedish ophthalmologist H. Sjogren first described the syndrome of "dry eye" in the same Sjogren's syndrome (an autoimmune disease which reduces the secretion of salivary, lacrimal glands, etc.). This so-called primary syndrome of "dry eye" which occurs in 1% of the population. The development of modern technology has allowed in 1995 to allocate the secondary syndrome of "dry eye" which, according to various estimates, affects up to 20% of the population, and up to 48% of office workers.
What is this disease?
When we blink, we not only wets the cornea of the eye a tear, but leave it "tear film". It normally remains in the eye from 10 to 45 seconds, then bursts. We blink again and the process repeats.
Each layer of the tear film: the lipid prevents evaporation and keeps it on the cornea, water — moisturizes and nourishes the cornea, provides immune protection, the mucin layer decreases the surface tension of the tears. The violation of developing one of the components of the tear film affects its quality. It starts faster burst, there is a feeling of discomfort and symptoms of dry eye.
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