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# Primary congenital glaucoma

Raised eye pressure in infancy from an abnormal [drainage angle](https://durgical.com/en/anatomy/iridocorneal-angle/): a watery, light-sensitive baby with large, cloudy corneas. Surgery is needed early.

Updated Nov 5, 2026

On this page

- The basics What it is
- Who gets it
- Causes
- Risk factors
- Pathophysiology
- Why it happens

- Clinical Symptoms and signs
- Red flags
- Diagnosis
- Differential diagnosis
- Complications
- Prognosis

- Treatment Goal of treatment
- Treatment
- Prevention

- Study Test yourself

- Connections Connections

## What it is

A glaucoma of infancy caused by abnormal development of the drainage angle. The infant's eye is elastic, so the raised pressure stretches it: the [cornea](https://durgical.com/en/anatomy/cornea/) enlarges and becomes cloudy. Unlike adult glaucoma it is treated mainly with surgery, and delay causes permanent damage to the optic nerve.

See it in 3D

- [Cornea](https://durgical.com/en/anatomy/cornea/)
- [Iris](https://durgical.com/en/anatomy/iris/)
- [Ciliary body](https://durgical.com/en/anatomy/ciliary-body/)
- [Optic disc](https://durgical.com/en/anatomy/optic-disc/)

## Who gets it

Rare. Usually diagnosed in the first year of life, more often in boys, and in both eyes in most cases; more frequent where consanguinity is common.

## Causes

- Developmental anomaly of the trabecular meshwork and angle
- Inherited forms (often autosomal recessive)

## Risk factors

- Family history
- Parental consanguinity

## Pathophysiology

The angle structures fail to mature, so aqueous humour cannot drain. Pressure rises and stretches the young eye: the cornea enlarges, breaks in Descemet membrane let fluid into the cornea (cloudiness, horizontal lines) and the optic nerve is damaged.

## Symptoms and signs

- Excessive tearing
- Light sensitivity (photophobia)
- Squeezing of the [eyelids](https://durgical.com/en/anatomy/superior-tarsus/) (blepharospasm)
- Large or cloudy cornea
- Large-looking eyes (buphthalmos)

## Red flags

- Tearing plus photophobia in an infant
- Corneal haze or enlargement
- Asymmetry in the size of the eyes

## Diagnosis

**Clinical**
Suspected clinically and confirmed by ophthalmology, usually under anaesthesia: corneal diameter, eye pressure, gonioscopy and [optic disc](https://durgical.com/en/anatomy/optic-disc/) exam.

**Tests**
Measurement of corneal diameter and axial length; genetic counselling when inherited.

**Imaging**
Ocular ultrasound for axial length when the view is poor.

## Differential diagnosis

- Congenital nasolacrimal duct obstruction (tearing without photophobia or corneal changes)
- Megalocornea
- Birth trauma to the cornea
- Congenital corneal dystrophies

## Goal of treatment

Lower the eye pressure surgically as early as possible and treat amblyopia.

## Treatment

**Surgical**
Angle surgery (goniotomy or trabeculotomy) as the first-line treatment.

**Medical**
Pressure-lowering drops as a bridge before surgery or as an adjunct.

**Conservative**
Refraction, glasses and amblyopia treatment.

**Follow-up**
Lifelong pressure and [optic nerve](https://durgical.com/en/anatomy/optic-nerve/) follow-up.

## Complications

- Permanent optic nerve damage and blindness
- Corneal scarring
- Amblyopia and high myopia
- Retinal detachment in very large eyes

## Prognosis

Good pressure control in many children with early surgery; visual outcome depends on corneal clarity and amblyopia treatment.

## Prevention

- Early recognition at well-child visits
- Genetic counselling for affected families

## Test yourself

Think of the answer, then tap the question to see it.

## What is the classic triad of primary congenital glaucoma?

Tearing, light sensitivity and squeezing of the eyelids, with an enlarged or cloudy cornea.

## What is the first-line treatment?

Angle surgery (goniotomy or trabeculotomy).

## Why does the infant's eye enlarge?

Because the young eye wall is elastic and stretches under raised pressure.

[Add to my cards (3)](https://durgical.app/estudiar/?add=/en/conditions/primary-congenital-glaucoma/)

## Why it happens

- [Glaucoma and the optic nerve](https://durgical.com/en/general-pathology/glaucoma-and-the-optic-nerve/)

## Connections

## Related conditions 2

- [Open-angle glaucoma](https://durgical.com/en/conditions/open-angle-glaucoma/)
- [Strabismus and amblyopia](https://durgical.com/en/conditions/strabismus-and-amblyopia/)

Educational information, not medical advice. For any symptom, see a health professional.

Sources: [Primary Congenital Glaucoma](https://www.ncbi.nlm.nih.gov/books/NBK574553/) (StatPearls Publishing (NCBI Bookshelf), 2024).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/conditions/primary-congenital-glaucoma/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/conditions/primary-congenital-glaucoma/