We usually read that writers often us bright eyes to describe the protagonists have beautiful eyes in their literatures. Yes, our eyes can’t leave the moisture of water, ray ban and the water that moistens our eyes is tears excreted by our tear ducts and subaltern tear ducts.
Th ordinaire people is in the condition of clear-headed and peace,excrete 0.5－1.0 ml tear every 16 hours, When stimulated and mood fluctuates, the exudation of tear can obviously increase. It will be the time for your eyes lack water when your eyes feel dry, ray ban online distending or broil caused by less secretioned tear or lacrimal anomaly. This case,it is named xerophthalmia on medicine,also named conjunctival xerosis,in autumn and winter ,should give the eyes to "add water", avoid of sufferring from this symptom.
Therefore, why the eyes could have the trouble "drought"? How prevent us suffering from dry eye disease?
Actually, xerophthalmia is not sole disease, ray ban shop but causes by several kind of different completely causes of disease that take the eye dry and tear little as characteristic. Their pathogenesis is different, and pathogenic process and clinical performance is also totally different. According to the different causes, it can be divided into three categories.
Substantive conjunctival corneal xerosis: found in a wide range of eyelid conjunctival scar, undermining its own endocrine glands and the conjunctival goblet cells, and even the lacrimal gland, tear ducts caused. For example: the severe II and III period of trachoma, wide range of thermal or chemical burns, serious chronic conjunctivitis and pemphigoid and so on. With the stimulus of long-term sand, dust and fumes and long-time watching television, using computers and wearing contact lenses are also common causes leading to chronic conjunctivitis.
Sjogren's disease or dry eye syndrome: this kind of diseases has no clear causes. And it is found in recent years that it may be caused by the abnormality of innate immune system. It it the immune response induced by acquired antigen stimulation. Main symptoms are keratoconjunctivitis sicca, dry mouth and concurrent connective tissue disease.
Conjunctival epithelial xerosis: This is one of the reflections of vitamin A deficiency. It is caused by the large quantities to consume and less intake in vitamin A consumed in the body. If a baby suffered form the disease it mainly because the improper feed, malabsorption or suffered from measles, pneumonia, dysentery, and diarrhea etc. Matured are mainly shows on people who suffered form advanced liver cancer, hepatocirrhosis and chroni
Although the causes of dry eye are different and their treatments vary a lot, but the symptomatic treatment is the same---that is to use artificial tears to make up for lack of tear secretion. Eye drops, for example, can help you to keep the eyes moist, while the eye drops can alleviate discomfort of dry eye when you are wearing contact lenses.
Although medicine can be used to relieve dryness of eyes to varying degrees and to keep eyes moist, what I want to remind you of is that using artificial tears is just a symptomatic treatment and it is unable to cure the disease once and for all. Therefore, try to find out the real cause in the course of treatment, and carry out the treatment actively for the cause. If it is conjunctival epithelial xerosis induced by lack of vitamin A, then extra vitamin A is needed at the same time.