What are the two primary types of glaucoma?

The two primary types of glaucoma are classified as open-angle and closed-angle. Open-angle glaucoma is the most common form, characterized by a gradual increase in intraocular pressure due to the slow clogging of the drainage canals, leading to optic nerve damage over time. It often develops without noticeable symptoms, which is why regular eye exams are crucial for early detection.

Closed-angle glaucoma, on the other hand, occurs when the iris bulges forward to narrow or block the drainage angle formed by the cornea and iris, which can lead to a rapid increase in intraocular pressure. This type can present as a medical emergency, often accompanied by symptoms like severe headache, nausea, vomiting, and visual disturbances.

Understanding these distinct classifications is vital for appropriate diagnosis and management of glaucoma, as treatment strategies may differ significantly between the two forms. The other classifications, such as acute and chronic or primary and secondary, refer to different characteristics or etiologies but do not define the primary types of glaucoma in the context of intraocular pressure and drainage mechanisms.