types of glaucoma
The two main types of glaucoma are primary open angle glaucoma (POAG) and angle closure glaucoma, but there are several other types of glaucoma.
- Primary Open Angle Glaucoma- the most common type of glaucoma and it is hereditary. The optic nerve is damaged due to an increase of intraocular pressure (IOP), or pressure inside the eye. This type of glaucoma develops slowly and sometimes without noticeable sight loss for many years because there are no symptoms or warning signs. It usually responds well to medication, especially if caught early and treated.
- Angle Closure Glaucoma- more rare and is very different from open angle glaucoma in that the eye pressure usually rises very quickly. Symptoms of angle closure glaucoma may include headaches, eye pain, nausea, rainbows or halos around lights at night, and very blurred vision.
- Normal Tension Glaucoma-when optic nerve damage has occurred despite an increase in eye pressure
- Secondary Glaucoma- any case in which another disease causes or contributes to increased eye pressure, resulting in optic nerve damage and vision loss.
- Pediatric Glaucoma- consist of congenital glaucoma (present at birth), infantile glaucoma (appears during the first three years), and juvenile glaucoma (age three through the teenage or young adult years). The range of treatment is very different from that for adult glaucoma, so it is very important to catch pediatric glaucoma early in order to prevent blindness.