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Glaucoma is commonly referred to as if it were one disease, but it’s actually a range of conditions in which the optic nerve is damaged. If you've been diagnosed with glaucoma, your eye specialist will let you know what type it is you have. Glaucoma can be:

Primary open angle glaucoma

The most common form of glaucoma, open angle glaucoma happens when the eye’s drainage canals become clogged or the tissues around the canals harden over time. Because fluid can’t drain out of the eye, there is excessive eye pressure and damage to the optic nerve can happen. The nature of open angle glaucoma means that most people have no symptoms and no early warning signs – so regular eye checks are immensely important.

Download our primary open angle glaucoma fact sheet to learn more. 


Acute angle Glaucoma (ACG)

With ACG, the fluid inside the front of the eye cannot reach the angle of the eye where the drainage system of the eye is located. That’s because the angle becomes blocked by part of the iris, the coloured part of the eye. The build-up of fluid inside the eye results in a sudden increase in pressure. This condition is an emergency, requiring immediate treatment to improve the flow of fluid.

Download our acute angle fact sheet to learn more.  


Angle closure glaucoma

The trabecular meshwork is where fluid exits from the eye in the angle of space called the anterior chamber. Sometimes, the angle can become blocked by part of the iris, so fluid is obstructed and eye pressure becomes too high. There are several different types of angle closure glaucoma – such as intermittent, chronic, and severe.

Download our angle closure glaucoma fact sheet to learn more.  


Pigment dispersion syndrome

Similar to angle closure glaucoma, pigment dispersion syndrome is a condition in which the trabecular meshwork is unable to function properly. Black pigment granules can clog the meshwork, meaning fluid can’t drain out of the eye properly.

Download our pigment dispersion syndrome fact sheet to learn more.  


Pseudoexfoliation Syndrome

Sometimes, the trabecular meshwork can also become blocked by flaky, white material. It is estimated that pseudoexfoliation syndrome makes up around 25% of glaucoma cases around the world.

Download our pseudoexfoliation syndrome fact sheet to learn more.  


Paediatric Glaucoma

There is a chance that children may also get glaucoma. In many cases the cause is genetic, but can sometimes happen after cataract surgery or trauma to the eye.


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