Primary congenital glaucoma

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Primary congenital glaucoma
Synonyms	Buphthalmos, infantile glaucoma
Pronounce	N/A
Specialty	N/A
Symptoms	Photophobia, epiphora, blepharospasm, corneal edema, enlarged eye
Complications	Vision loss, optic nerve damage
Onset	Infancy
Duration	Chronic
Types	N/A
Causes	Genetic mutation
Risks	Family history, genetic predisposition
Diagnosis	Tonometry, gonioscopy, ophthalmoscopy
Differential diagnosis	Congenital cataract, retinoblastoma, corneal dystrophy
Prevention	N/A
Treatment	Surgery, medication
Medication	Beta blockers, carbonic anhydrase inhibitors
Prognosis	Variable, depends on early detection and treatment
Frequency	1 in 10,000 to 20,000 live births
Deaths	Rare, but can lead to significant visual impairment

Primary congenital glaucoma (PCG) is a rare eye condition that occurs in infants and young children. It is characterized by an abnormal development of the eye's drainage system, leading to increased intraocular pressure (IOP), which can damage the optic nerve and result in vision loss.

Pathophysiology

Primary congenital glaucoma is caused by developmental anomalies in the trabecular meshwork and the anterior chamber angle of the eye. These anomalies impede the normal outflow of aqueous humor, leading to elevated intraocular pressure. The increased pressure can cause buphthalmos, or enlargement of the eye, due to the elasticity of the infant's eye tissues.

Clinical Features

The classic triad of symptoms in primary congenital glaucoma includes:

• Epiphora (excessive tearing)
• Photophobia (sensitivity to light)
• Blepharospasm (involuntary tight closure of the eyelids)

Other signs include corneal edema, corneal clouding, and an enlarged corneal diameter. The condition is often bilateral, affecting both eyes.

Diagnosis

Diagnosis of primary congenital glaucoma is typically made through a combination of clinical examination and diagnostic tests. Key diagnostic procedures include:

• Measurement of intraocular pressure using a tonometer
• Examination of the anterior chamber angle using gonioscopy
• Assessment of the optic nerve head for signs of damage

Treatment

The primary treatment for primary congenital glaucoma is surgical intervention. The most common surgical procedures include:

• Goniotomy
• Trabeculotomy
• Trabeculectomy

These procedures aim to improve the outflow of aqueous humor and reduce intraocular pressure. In some cases, medications may be used to manage intraocular pressure before or after surgery.

Prognosis

The prognosis for primary congenital glaucoma varies depending on the severity of the condition and the success of surgical interventions. Early diagnosis and treatment are crucial for preserving vision. Regular follow-up is necessary to monitor intraocular pressure and optic nerve health.

See also

• Glaucoma
• Ophthalmology
• Pediatric ophthalmology