Often seen in a number of literary works, use this word of bright eyes to describe people's eyes pretty. Indeed, human eyes can not do without water, ray ban while the water nourishing eyes is the tear secreted by the lacrimal gland and the deputy gland.
Normal people can secrete 0.5 to 1.0 ml tears under the state of consciousness and calmness. The secretory volume will have an evident increase if eyes irritation occurs or one’s moods swerve. 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 uk it means that they are suffering from “water scarcity”. This is called dry eye in medicine, also known as ocular sicca. In autumn and winter, water should be given to the eyes, which avoids suffering from this disease.
Then, why do eyes need "water" so much? How to "fight drought" for the dry eyes?
Actually, xerophthalmia is not sole disease, ray ban sale but causes by several kind of different completely causes of disease that take the eye dry and tear little as characteristic. They have different pathogenesis, and so are their pathologic process and clinical manifestation. They can be classified as three kinds according to the causes of diseases.
Substantive conjunctival corneal xerosis: it shows on broad scars with eyelids and conjunctivas, which destroyed the secretories and gobletcells, and even the tear ducts and lacrimal ducts. Such as: the serious stage in first or second period time, trachoma, thermal or chemical extensive burns, severe, chronic conjunctivitis and 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 eyes and dry mouth syndrome, arthritis, or known as dry eye syndrome: This is an unclear cause of disease, discovered in recent years may be due to innate immune system abnormalities. With the antigen stimulation, immune reactions are caused. It is mainly manifested in kerato conjunctivitis sicca, dry mouth and concurrent connective tissue disease.
Under the stimulus of antigenic, cause the immune response. The main performance is keratoconjunctivitis sicca, xerostomia and the concurrent connective tissue diseases. The infant illnesses are often appeared in improper artificial feeding, malabsorption or measles, pneumonia, dysentery, diarrhea and so on consumptive diseases. The adult are often appearred in the later period liver cancer, liver cirrhosis and the long-t
Though because of different pathogenies of exrophthalmia they have different treatments, symptomatic treatment is the same, that’s use manmade tears to supply the hyposecretion of tears. For example eye drops can help you to keep the eyes moist, while the eye drops is when can you wear contact lenses to alleviate dry eye discomfort.
Although drugs can alleviate symptoms of dry eyes to different degrees to make dry eyes moist, what should remind is that artificial tears is only symptomatic treatment and it can not cure totally. Therefore, in the course of treatment as soon as possible a clear cause, actively carry out the treatment for the cause, such as a lack of vitamin A-induced conjunctival epithelial xerosis, but also the same time, vitamin A.