Xerophthalmia could be because of the insufficient amount of tears or poor quality, resulting in dry eye syndrome. The seriousness of dry eye can result in trouble for the corneal epithelium. Insufficient variety of tears: normal speed of eye secrete tears: 1|?¡ì?L / min. Inadequate secretion or evaporation excessive may cause Oakley Half Jacket Polarized Sunglasses tears group of deficiencies. The poor quality of tears: the standard tear through the ocular surface produce a layer on the tear film, broken into three layers: the lipid layer, water layer, mucin layer of one's tear film externaly to inside, any the layer appear abnormal tear quality will reduce. Disease Overview Keratoconjunctivitis sicca, best known "dry eye" denotes abnormal tear Oakley Frogskins Sunglasses Clearance quality or number of any causes or dynamics abnormal, triggering decreased tear film stability and ocular surface tissue lesion characteristics relating to ocular discomfort and (or) much more than various kinds of diseases more often than not. Cornea Cornea Common symptoms include Dry eyes Sese, easily tired, sleepy, itching, foreign body sensation, pain, burning sensation, heavy eyelids tight, thick secretions, terrified Designer Oakley Multilens Sunglasses of the wind, photophobia, very responsive to external stimuli, temporary blurred vision; sometimes too dry eyes, loss of basic tear but to stimulate the reflex tear secretion due to tears often flow of symptoms; nastier eye swelling, congestion, keratinization, corneal epithelial nonintact filaments adhesion, long-term the injury will lead to corneal and conjunctival lesions, and definitely will affect vision.