The shape of the eye is maintained by fluid pressure, called intraocular pressure, which is normally in the range of 12 to 24 mm Hg. When the circulation of fluid in the eye is blocked, it can lead to a buildup in pressure, a condition called glaucoma. The net pressure can become as great as 85 mm Hg, an abnormally large pressure that can permanently damage the optic nerve. To get an idea of the force involved, we suppose that the back of the eye has an area of 7 cm² and the net pressure is 85 mm Hg, Calculate this force? Normal Eye Eye with Glaucoma Build Up of Aqueous Humor Fluid Trabecular Meshwork PRESSURE Damage to the optic nerve F= 7.9 N which really represent the weight for a mass of 790 grams
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We are given the net pressure in the eye with glaucoma as 85 mm Hg and the area of the back of the eye as 7 cm². We need to find the force exerted on the back of the eye. Show more…
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Glaucoma. Under normal circumstances, the vitreous humor, a jelly-like substance in the main part of the eye, exerts a pressure of up to $24 \mathrm{~mm}$ of mercury that maintains the shape of the eye. If blockage of the drainage duct for aqueous humor causes this pressure to increase to about $50 \mathrm{~mm}$ of mercury, the condition is called glaucoma. What is the increase in the total force (in newtons) on the walls of the eye if the pressure increases from $24 \mathrm{~mm}$ to $50 \mathrm{~mm}$ of mercury? We can quite accurately model the eye as a sphere $2.5 \mathrm{~cm}$ in diameter.
Glaucoma. Under normal circumstances, the vitreous humor, a jelly-like substance in the main part of the eye, exerts a pressure of up to 24 $\mathrm{mm}$ of mercury that maintains the shape of the eye. If blockage of the drainage duct for aqueous humor causes this pressure to increase to about 50 $\mathrm{mm}$ of mercury, the condition is called glaucoma. What is the increase in the total force (in newtons) on the walls of the eye if the pressure increases from 24 $\mathrm{mm}$ to 50 $\mathrm{mm}$ of mercury? We can quite accurately model the eye as a sphere 2.5 $\mathrm{cm}$ in diameter.
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