when the eyes are exposed to outdoor sand and sunshine for a long time, or face the computer screen for a long time, it is easy to feel dry. In the blink of an eye, the dryness disappeared. As soon as everyone opens his eyes, he blinks every other moment unconsciously, usually once every 2-8 seconds, 0.2-0.4 seconds each time is enough. Each blink can make tears evenly wet the cornea and conjunctiva, so that the eyes will not be dry. When the dust enters the eyes, people immediately close their eyes and shed tears. Washing the dust in the eyes through tears plays a role in protecting the eyes. If the number of blinks is reduced by 75%, the secreted tears are greatly reduced, so that a complete tear film cannot be formed or the tear film breaks early, xerosis will exist for a long time, which can damage the cornea.
xerophthalmia, also known as dry conjunctival keratitis, is a disease in which the conjunctiva and corneal epithelium cannot maintain normal function due to the insufficient quality and quantity of anterior tear film. The eyes will feel dry, congested, foreign body, burning, itching, photophobia and redness. In severe cases, the cornea will become turbid and blurred. There are two types of
xerophthalmia: rapid evaporation of tears and insufficient secretion of tears. Lacrimal insufficiency is mainly related to systemic immune diseases, such as xerophthalmia syndrome, rheumatoid arthritis, ankylosing spondylitis, lupus erythematosus, hypothyroidism or hyperthyroidism. How can
prevent and treat xerophthalmia?
should be used properly at ordinary times. Do not blink “eyes” for 4 ~ 5 times / minute. Rest for 5 ~ 10 minutes after using your eyes for 1 hour. During rest, you can do some exercises to nourish your qi and eyes or look at the distance. Do not blow the air conditioner for a long time to ensure the humidity of the workshop. In an air-conditioned room, drink more water to reduce the dryness of your eyes. Wear less contact lenses. Eat more fruits, vegetables, dairy products, fish and other vitamin rich foods.