What is glaucoma?
Glaucoma is a disease that damages the eye’s optic nerve. The optic nerve is connected to the retina — a layer of light-sensitive tissue lining the back of the eye. The optic nerve is made up of many nerve fibers, like an electric cable is made up of many wires. The optic nerve sends signals from your retina to your brain, where these signals are interpreted as the images you see.
If the drainage angle is blocked, excess fluid cannot flow out of the eye, causing the fluid pressure to increase.
In the healthy eye, a clear fluid called aqueous (pronounced AY-kwee-us) humor circulates inside the front portion of your eye. To maintain a constant healthy eye pressure, your eye continually produces a small amount of aqueous humor while an equal amount of this fluid flows out of your eye.
The fluid flows out through a very tiny drain called the trabecular meshwork, a complex network of cells and tissue in an area called the drainage angle.
If you have glaucoma, the aqueous humor does not flow through the trabecular meshwork properly. Fluid pressure in the eye builds up and over time causes damage to the nerve fibers.
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