Explanation of different forms of glaucoma

There are many different types of glaucoma. They are categorised according to the cause of the increased intraocular pressure. In most cases, there is an obstruction to the outflow of aqueous humour.

Open-angle glaucoma

Primary open-angle glaucoma:
The chamber angle is open, but the trabecular meshwork (drainage system) is not functioning properly.

There are two types:
With increased intraocular pressure:
Most common form, usually in people aged 40 and over. The pressure rises slowly and unnoticed, leading to irreversible damage.

With normal intraocular pressure(normal pressure glaucoma):
The eye pressure is normal, but the optic nerve is still damaged. Particularly common in Japan.

Types of glaucoma explained

Find out more about the different types of glaucoma and their causes.

Secondary glaucoma

Find out more about secondary glaucoma and possible causes and treatment options.

Open-angle glaucoma

Find out more about open-angle glaucoma and its effects on the eyes.

Narrow-angle glaucoma

Find out more about narrow-angle glaucoma and how it can be treated.