Glaucoma types

Glaucoma said to be primary when the cause of the glaucoma is unknown while it is called secondary when there is increase in I.O.P secondary to another ocular diseases.

Primary glaucoma

Primary open angle glaucoma is divided into:

1- primary open angle glaucoma

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2- Normal pressure glaucoma.

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Primary angle closure glaucoma is divided into:

1- Acute angle closure glaucoma

2- Intermittent angle closure glaucoma

3- Chronic angle closure glaucoma

4- Latent angle closure glaucoma

Secondary glaucoma

1- Pre-trabecular

2- Trabecular

3- Post trabecular causes.

Trabecular meshwork is the part of the eye in which drainage of the aqueous humor outside the eye occur.

1- Pre-trabecular:

1- With pupil block: inflammation with posterior synechia, occlusion of the pupil either with the I.O.L in case of pseudophakic or vitreous gel in cause of aphakic and due to forward movement of the lens or swelling of the cataract lens..... For more information about pupillary block click here

2- Without pupil block which is due to:

A- changes in the posterior segment.

B-changes in the anterior segment with iris-trabecular contact due to synechial closure of the angle

3- Small eyes

4- Cellular proliferation with angle closure

2- Trabecular causes:

1- Angle injury

2- Occlusion by cells or materials. Pigmentary glaucoma, pseudoexfoliation glaucoma, phacolytic glaucoma, haemolytic glaucoma, siderosis and tumor infiltration

3- Uveitis

4- Steroid-induced glaucoma

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3- Post trabecular outflow obstruction: