[Neovascular glaucoma--etipathogeny and diagnosis]

Area of Science:

• Ophthalmology
• Vascular Biology

Context:

• Neovascular glaucoma is a severe secondary glaucoma characterized by neovascularization of the iris and anterior chamber angle, leading to increased intraocular pressure.
• It is frequently caused by severe retinal ischemia, with diabetic retinopathy, central retinal vein occlusion, and ocular ischemic syndrome being the most common underlying diseases.

Purpose:

• To define neovascular glaucoma and outline its common and uncommon causes.
• To highlight the role of vascular endothelial growth factor (VEGF) in the pathogenesis of intraocular neovascularization and neovascular glaucoma.
• To describe the four-stage evolution of neovascular glaucoma, from predisposing conditions to angle closure.

Summary:

• Neovascular glaucoma involves new blood vessel formation in the iris and anterior chamber angle, causing elevated intraocular pressure.
• Key causes include diabetic retinopathy and retinal vein occlusion, driven by vascular endothelial growth factor.
• The condition progresses through four stages: prerubeotic, preglaucomatous, open-angle, and angle-closure glaucoma.

Impact:

• Provides a clear definition and etiological classification of neovascular glaucoma.
• Emphasizes the critical role of VEGF in the disease's development.
• Establishes a staging system for understanding the progression of neovascular glaucoma, aiding in diagnosis and management.