Choroidal and Retinal Features in PACD and POAG on OCT and OCTA

Glaucoma is a group of irreversible, progressive optic neuropathies that can lead to severe visual field defects and even blindness, affecting nearly 95 million people worldwide. Based on anterior chamber angle structure, glaucoma is classified into primary angle-closure glaucoma (PACG) and primary open-angle glaucoma (POAG). Although POAG is more common, PACG is more severe and more likely to cause blindness if not managed appropriately. Globally, PACG accounts for approximately 25% of all glaucoma cases but is responsible for roughly 50% of glaucoma-related blindness. Generally, the term "glaucoma" implies optic nerve damage; however, glaucomatous optic neuropathy may be absent in subacute and acute angle-closure glaucoma. Therefore, according to international consensus, primary angle-closure disease is categorized as PACD-encompassing primary angle-closure suspect (PACS), primary angl