What’s glaucoma? It is caused by the obstacle of the smooth flowing of the eye water. The transparent tissue of eye obtains nutrition from eye water. And eye water is produced by JieZhuangTi which stores in the front half part of eyeball and absorbed by blood when they are expeled from the duct. Once the duct is obstructed, eye water can not flow smoothly, they will be stocked in the eye, thus eye pressure inside the eyeball will increase, and optic nerve will be pressed and moreover be damaged, and thus eye shot will become smaller and smaller, and thus glaucoma is caused. .............................................................................. Symptom of glaucoma 　　Acute glaucoma has such feelings as eye pain, headache, vomit etc. and all symptoms are very quick. Contrarily, there is also chronic glaucoma which is without any feel when it begins and can easily be omitted and therefore cause cure delay. 　　Eyeshot imperfect is one of the most important features of glaucoma. Thus we can estimate the degree of glaucoma as per the variety of eyeshot. Whereas, the changing of eyeshot often appears in 3 to 5 years after the changing of eyeground ( when 40 percent above of the visual nerve fiber were damaged). 　　Under normal condition, the eyeshot of chronic glaucoma sufferer is very narrow, thus they see things just as from tube. Therefore, it is very inconvenient for their daily life such as walking, stair down, smoke lighting etc. even though their eyesight medical checking is under normal codition. While many sufferer’s chronic glaucoma are developed due to the neglecting of the symptom. ..............................................................................