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Updated: Mar 31, 2026
Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
Published on: February 15, 2022
Primary congenital glaucoma
Fang Ko1, Maria Papadopoulos1, Peng T Khaw1
1National Institute for Health Research (NIHR) Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK.
Insights
Primary congenital glaucoma (PCG) is a common infant eye condition. Early diagnosis and angle surgery, like circumferential trabeculotomy, are crucial for preserving vision and preventing blindness.
Area of Science:
- Ophthalmology
- Genetics
- Developmental Biology
Background:
- Primary congenital glaucoma (PCG) is the leading cause of nonsyndromic glaucoma in infants, potentially causing blindness.
- PCG is linked to CYP1B1 gene mutations and is more prevalent in populations with consanguinity.
- Pathophysiology involves arrested development of neural crest-derived tissues in the third trimester, leading to abnormal anterior chamber angle formation.
Purpose of the Study:
- To review the clinical presentation, diagnosis, and management of Primary Congenital Glaucoma (PCG).
- To highlight recent surgical advancements in PCG treatment.
Main Methods:
- Literature review of PCG etiology, clinical findings, and treatment outcomes.
- Focus on surgical interventions, including traditional and novel angle surgeries.
Main Results:
- Classic PCG symptoms include tearing, photophobia, and blepharospasm.
- Diagnostic signs include elevated intraocular pressure, corneal edema, and enlarged axial length.
- Circumferential trabeculotomy offers a single-stage approach to incise the entire angle, potentially improving outcomes over incremental methods.
Conclusions:
- Prompt diagnosis and surgical intervention are vital for managing PCG and preventing vision loss.
- Angle surgery, particularly circumferential trabeculotomy, is the primary treatment, with trabeculectomy or glaucoma drainage devices as secondary options.
- Understanding the genetic and developmental basis of PCG aids in refining treatment strategies.
Abstract:
Primary congenital glaucoma (PCG) is the most common nonsyndromic glaucoma in infancy, which can lead to blindness, or a lifetime of vision when diagnosed and treated properly. PCG is more common in populations with a higher prevalence of consanguinity and is associated with CYP1B1 gene mutations which show variable expressivity and phenotypes. The immature angle appearance of PCG likely results from arrested development of tissues of neural crest origin in the third trimester, with the severity of abnormality varying according to the stage at which arrested development occurred. Classic symptoms at presentation include tearing, photophobia, blepharospasm, eye rubbing, and irritability. Examination may reveal elevated intraocular pressure, corneal edema, increased corneal diameter, Haab striae, or enlarged axial length. Angle surgery remains the first line treatment for PCG with a recent advance being circumferential trabeculotomy with the potential to incise the whole angle during one operation as oppose to an incremental approach and the associated multiple anesthetics. Once angle surgery fails, either trabeculectomy or glaucoma drainage device surgery may be appropriate.
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