Types of Glaucoma
Glaucoma is actually a group of diseases. The most common types of glaucoma are:
Open angle glaucoma
This is the most common form of glaucoma. In open angle glaucoma the mesh-like channel appears open but does not drain fluid efficiently. This results in a build up of pressure inside the eye which can damage the optic nerve. This type typically develops very slowly.
Angle closure glaucoma
This is more common in Asian populations. In angle closure glaucoma the coloured part of the eye (called the iris) blocks the mesh-like channel. Pressure usually rises slowly but can rise suddenly in this type of glaucoma.
How is glaucoma diagnosed?
Because glaucoma has few early symptoms or warning signs, it is important to see an optometrist or ophthalmologist for an eye examination. A glaucoma check will include:
- A measurement of your eye pressure
- A test of your side or peripheral vision
- Examination of the drainage channel of the eye with a special lens
- Examination of the optic nerve with a special lens, photograph, or imaging device