The glaucomas can be classified into two main types,. The first type is open angle glaucoma (OAG). The second type is angle closure glaucoma (ACG). In OAG the anterior chamber angle is not manifestly occluded.  In ACG the anterior chamber angle is obstructed, usually by the iris.

OAG and ACG are each divided into primary and secondary types:

  • primary OAG (POAG),
  • primary ACG (PACG),
  • secondary OAG (SOAG), and
  • secondary ACG (SACG).

Primary means there is no identifiable cause for the glaucoma or the cause is inherent in the eye. The term primary is used here in the same way that it is used for primary hypertension. Secondary glaucoma means the glaucoma developed due to an initial ocular or systemic disease.

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Lowe Syndrome, Oculocerebrorenal Syndrome

Lowe Syndrome is an x-linked disorder that presents with bilateral congenital cataracts and often with bilateral congenital glaucoma. 
December 28, 2022

Nystagmus in Children

Nystagmus in Children What is nystagmus?: The term nystagmus is used to describe an involuntary rhythmic movement or oscillations of the eyes. These wobbly eye […]
December 18, 2022

Ocular Ultrasound

Ocular ultrasound, employing the same principles used in fetal ultrasound, although on a smaller scale, facilitates examination of the eye.
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Optic Nerve – Structure | Function | Testing

Optic Nerve Structure and Function Optic Nerve Structure and Function The optic nerve is what connects the eye to the brain. The optic disc is the end […]
December 27, 2022

Optic Nerve Glioma

Is this a life-threatening tumor? : In contrast to that found in adults, optic nerve gliomas in children are benign. However, it is visually threatening […]
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Optic Nerve Hypoplasia

Optic nerve hypoplasia, the most common optic disc anomaly, is due to a supranormal regression of optic nerve axons that starts before birth.


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