ELN and exfoliation syndrome: Pseudoexfoliative glaucoma (PXG) is the most usual form of secondary open-angle glaucoma, which develops as a result of pseudoexfoliative syndrome (PXS), a systemic circumstance characterized by abnormal production and accumulation of extracellular elastin-related microfibrillar materials within the anterior segment of the eye (including the lens capsule, ciliary body, iris, zonules and trabecular meshwork) and other organs such as the heart, lungs and kidneys.