The Eye: The Important Parts Of The Human Eye

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Eye is not only the most beautiful but also an important sensory organ and window of the soul. Eye is the organ of vision; it has a complex structure which consists of a transparent lens that focuses light on the retina. A protective cavity in the skull called the orbit in which eyeball is set. Among the important parts of the human eye are the cornea, iris, pupil, crystalline lens, vitreous, conjunctiva, sclera, choroids, the macula, retina and the optic nerve. The eye is filled with intraocular fluid; it maintains sufficient pressure in the eye ball, to keep it distended. Anterior and posterior chamber are filled with a fluid called aqueous humour. It is a slightly alkaline in nature, clear, watery fluid with a density higher than water. The volume of aqueous humour in the anterior chamber is about 0.25ml whereas in the posterior chamber is almost 0.06ml. It is constituted of water and traces of other constituents of the plasma. Aqueous humour is produced from the ciliary processes of the ciliary body and a very little …show more content…

Intraocular pressure is determined by the coupling of the production of aqueous humour and the drainage of aqueous humor through the trabecular meshwork located in the anterior chamber angle. The production, flow, and drainage of intraocular fluid are active continuous processes which are needed for the health of the eye. A normal eye produces about 4 ml of fluid per day, which circulates and then drains out of the eye. If the drainage system is clogged or if production of this fluid is raised pressure inside the eye can build up (Albert DM, et al; 1994). If the IOP is very high the rate of aqueous secretion will diminish consequently. It maintains the continuous supply of nutrition of the avascular structures like the cornea and the lens and also carries away their waste products. The most important function is that it helps to maintain a constant intraocular

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