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Glaucoma - Symptom, Causes, Treatment of Glaucoma


Glaucoma is a life-threatening disorder induced by extend pressure of fluid within the eyebaH. As the pressure enlarge, the small blood vessels which supply the optic nerve are constricted, leading to ruination of nerve fibresand gradual loss of vision. Usually, pressure within the eye is kept invariant by equal production and drainage of the clear watery fluid in the front of the eye in the middle of the cornea ( diaphanous area in front of the coloured part) and the lens. This fluid is known as the aqueous humour and is in two chambers: the posterior chamber between the back of the iris (the coloured portion of the eye) and the lens, and the anterior chamber between the front of the iris and pupil and the back of the cornea.

Aqueous humour is exposed by tiny glands in the ciliary bodies down the outer edge of the iris. It feeds forwards close to the internal rim of the iris through the pupil from the posterior to the anterior chamber. There it drains into minor canals where the iris and cornea connect at the outer edge of the iris (known as the drainage angle). This slow, consecutive flow always refreshes the aqueous humour. Anything that decelerates drainage of the aqueous humour or interferes with its flow can produce to extend pressure within the eyeball - and therefore to glaucoma. There are two primary types of glaucoma.

 

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