Dry Eye Syndrome
Dry Eye Syndrome
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People blink about 10,000 times each day. Each blink is estimated to be once every 6 seconds. This blinking cleanses and restores tear film. Adequate tears will protect the eye from evaporation, create a smooth optical surface for clear vision, supply oxygen and nutrients to the eye and help prevent irritation and infection as well as being a reaction to emotion and pain. Some of symptoms of Dry Eye Syndrome include excessive tearing, pain, redness, irritation and sun and wind sensitivity. Tear film is consisted of three layers. Inner layer which keeps contact with cornea is called Mucin layer and is gel like to "hold" moisture to stay on the eye. Middle layer is called Aqueous layer which is more watery and keeps eyes hydrated This layer makes up 90 % of the tear film. Outer layer is a thin oily layer called Lipid layer which prevents evaporation of the aqueous layer. Of course, they're not delineated into three distinctive layers but these three components are necessary for normal function of tear film. Any condition that affects any of these layers will disrupt normal function of tear film. Such conditions like blepharitis, meibomian gland dysfunction, and acne rosacea, inflammatory dermatological condition can be the cause of dry eye condition as their inflammatory process impairs normal functions of tear glands in the lid margin. To treat DES, there are many options; simple as artificial tear ophthalmic drops, medicated ophthalmic drops such as Restasis, and punctual plugs. It is important to discuss the optimal treatment for individual cases and to follow up on the treatment since this is chronic and long term care.