Which classification of glaucoma is characterized by no other ocular or systemic abnormalities?

The classification of glaucoma characterized by no other ocular or systemic abnormalities is primary open angle glaucoma. This form of glaucoma arises without any identifiable cause or underlying disease that could lead to increased intraocular pressure. It is typically associated with an open drainage angle, and the elevation in intraocular pressure often occurs gradually. This condition leads to progressive optic nerve damage and visual field loss, which can occur without the presence of other ocular conditions.

In contrast, secondary glaucoma is associated with another eye disease or systemic condition, such as trauma, inflammation, or tumor growth. Congenital glaucoma results from developmental issues in the eye and is typically present at birth, often due to the abnormal development of the outflow pathways. Primary angle closure glaucoma involves an anatomical closure of the drainage angle of the eye, leading to sudden and often painful increases in intraocular pressure, typically associated with other ocular signs and symptoms. Each of these other classifications presents distinct characteristics that differentiate them from primary open angle glaucoma.