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This diagram shows the glaucoma population by age group for the years 2014, 2032 and 2050.

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Open-angle glaucoma
- Patchy blind spots in your peripheral vision
- Tunnel vision
Angle-closure glaucoma
- Severe headache
- Eye pain
- Nausea and vomiting
- Blurred vision
- Halos around lights
- Eye redness
Congenital glaucoma(only occurs in childhood)
- Keeps eyes closed
- Painfully sensitive to light
- Tears up a lot
- One or both eyes larger than normal
- Redness

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Glaucoma cannot be prevented or cured.
If Glaucoma is detected early than there are treatments to prevent any more damage.
Medicines: prescription eye drops, lower the pressure in your eyes to prevent damage to your optic nerve.
Laser treatment: doctors can use lasers to help the fluid in your eyes drain to lower pressure in your eye.
Surgery: If the other types of treatment don't work then surgery can be performed to help the fluid drain out of your eye.

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- Having high internal eye pressure
- Being over the age of 60
- Having a family history of glaucoma
- Being extremely nearsighted or farsighted
- Having diabetes, heart disease, high blood pressure and sickle cell anemia
- Having corneas that are thin in the centre
- Having had a prior eye injury

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Glaucoma is a group of eye diseases that can cause blindness and vision loss, it is caused by damaging the optic nerve. There are multiple types of Glaucoma, the most common type is open-angle glaucoma, some of the other less common types are called angle-closure glaucoma and congenital glaucoma.
Open-angle glaucoma: the eye drainage canals become clogged over time and increase internal eye pressure damaging the optic nerve.
Angle-closure glaucoma: the drainage canals become blocked very quickly leading to a rise in eye pressure. This type of glaucoma is very rare.
Congenital glaucoma: is a type of glaucoma that only affects children between the ages of birth to the age three.

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Central Nervous System
Glaucoma is caused by damage to the optic nerve, the optic nerve is part of the central nervous system. People with glaucoma can lose nerve tissue.