Definition and causes
The term glaucoma covers conditions with injuries after the high pressure in the eye. There are two types of glaucoma,narrow-angleglaucoma andopen-angleglaucoma. The difference between the two types are explained below.
The disease is very common, and risk increases, the older you get. The disease can now be treated in many different ways, but the untreated disease leading to blindness and is therefore a serious condition. The concept starling coming of an old German word to stare while it is called glaucoma, because pupil late in the course of the disease have a greenish tinge.
To the eye can stick around and tense, inflate it out of fluid, the fluid chamber, which is formed inside the eye beam body. Radiation body sits just behind the regnbuehinden (the color of the eye around the pupil), and from there the liquid runs out for the rest of the eye. The fluid chamber formed at a constant speed around the clock, and to keep the pressure normally fluid must therefore also running out of the eye again with a certain speed.
The fluid spill out from the eye through a channel, which lies in the angle between regnbuehinden and senehinden (the whites of the eyes). From the channel admitted fluid in the eye veins and kept away from the eye. When glaucoma is fluid prevented from running out of the eye, and thereby increases the pressure. The high pressure is doing damage to the eye structures, for example. nerve fibers in the optic nerve and gives the symptoms.
Types of glaucomaNarrow-angle glaucoma
Narrow-angle glaucoma is often an acute condition with very high pressure in the eye. The disease occurs mainly in long-sighted people. The long-sighted eye is shorter than normal, and will therefore narrow the angle.
With age lens of the eye becomes thickened and pressed regnbuehinden towards the angle, which then becomes more closed to. This can lead to the angle will be completely blocked, and pressure is growing rapidly.
Open Angled glaucoma
Open Angled glaucoma is the most common form. It is also called sometimes for chronic glaucoma because it develops slowly over time.
This is because afløbshindringen not that the angle is too narrow, but that channel is clogged. As the channel is not completely blocked, the pressure is not so much as by narrow-angle glaucoma, but when the pressure is too high for many years, made yet damage to the eye nerve.
The reason for the high pressure optic nerve damage in open-angle glaucoma, is probably a combination of the nerve fibers are pressed together, and thus destroyed, and that the blood supply to the nerve becomes bad, because blood vessels pressed together. When optic nerve damage, vision will slowly become worse.
Symptoms and treatment of glaucoma
Since both types of glaucoma are so different, they are described separately. Read more in narrow-angle glaucoma and open-angle glaucoma.