In our eye, facing the center of the black-eyed, a transparent double convex disc-shaped transparent organization, called the lens. Cataract is the lens becomes opaque turbid by a transparent, opaque as the camera lens becomes contaminated and obstruct the light entering the eye, decreased vision, an eye disease. Little effect on vision cloudy early, then gradually increased, leading to decreased vision and even blindness. Cataract formation mainly due to the denaturation of proteins, insoluble protein, sodium and calcium content, the increase in potassium and vitamin C reduced glutathione absence. 85% of the lens proteins for water-soluble albumin, water-soluble albumin into insoluble protein, the greater the age, the insoluble protein content of the more; vitamin C deficiency, the lens of the change of pH as well as some toxic substances into the lens can cause denaturation of lens proteins, resulting in cloudy. For the elderly lens oxidative damage is the initial factor in cataract formation, cataract formation, risk factors for excessive drinking and smoking too much, too much to women's reproductive and certain systemic diseases. Complicated cataract is a clouding of the lens caused by certain eye diseases, such as iridocyclitis, choroiditis, retinal detachment, retinitis pigmentosa, glaucoma, high myopia, old eye injury caused by the complicated cataract. Traumatic cataract, including mechanical, radiation, electric shock cataract. Metabolic cataract is more common in diabetic cataract. Corticosteroid cataract caused by ocular or systemic long-term heavy use of corticosteroids. After cataract extracapsular cataract extraction after surgery, the residual cortex and capsule opacity.
