We often read in a number of literary works in which they apply the word” bright” to describe people's eyes. Actually,People's eyes can't leave from the moistener of water, ray ban sunglasses and the water to moisten eyes is tear excretived by tear duct and assistant tear duct.
Everyone in normal health and in conscious and calm state will secrete 0.5-1.0 ml tear per 16 hours, and there is significantly increase of the secretion amount when the person is irritated and excited. If your eyes appear symptoms like dry, tingle and swell, causalgic and so on which are caused by many reasons such as reduced secretory volume or abnormal quality of tears, ray ban it means that they are suffering from “water scarcity”. This is called dry eye in medicine, also known as ocular sicca. Eyes in autumn and winter seasons should be given water to avoid suffering from this disease.
So, why did the eye trouble "drought"? How to help keeping from dry eyes?
In fact, dry eye syndrome is not a single disease, eyeglasses but a group of diseases characterized by several different diseases that caused dry eye. Their pathogenesises are different and the pathological processes and clinical performances are not the same as well. According to the different causes, they are 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 caused by the lacrimal gland and tear ducts. Such as: the serious stage Ⅱ, Ⅲ trachoma, thermal or chemical extensive burns, severe, chronic conjunctivitis, such as pemphigoid. And long-term sand, dust and fumes of the stimulus for a long time watching television, using computers and wearing contact lenses, etc. is also leading to a common cause of chronic conjunctivitis.
Dry eye and mouth arthritis syndrome or dry eye syndrome: this is a pathogeny-unknown disease, in recent years, we found that it may cause by the abnormalities of innate immune systems. Under the stimulation of getting antigen,evocable immunoreaction.It is mainly showed in keratoconjunctivitis sicca, dry mouth and concurrent connective tissue diseases.
Conjunctival epithelial xerosis: This is the ocular manifestations of vitamin A deficiency is one. Caused by vitamin A deficiency due mainly to the body of vitamin A consumed in large quantities, due to less intake. The babies will get this because of unproper way of feeding, maldigesting or have comsuming diseases such as measles, pneumonitis, dysentery, diarrhea and so on. Adults get this in late liver cancer, cirrhosis and long term chronic digestive tract disease
Although dry eye is due to a variety of causes, their treatments are different, symptomatic treatment is the same, that is to use artificial tears to make up for lack of tear secretion. For example eye drops can help you to keep the eyes moist, moreover the eye drops can alleviate dry eye discomfort when wearing contact lenses.
Although the medicine can alleviate the astringent symptom of the eyes, let the astringent eye obtain moisten, remind of everybody that the artificial tear is only the just right treatment for illness, can not cure permanently. So in the course of treatment we must make clear about the cause of disease as soon as possible, carry on the treatment aim at the cause of disease positively, for instance, the Vitamin A lack result the conjunctiva epidermis sickness, must supply with Vi