Which cranial nerve is primarily affected in open-angle glaucoma?

In open-angle glaucoma, the primary cranial nerve affected is the optic nerve, which is associated with cranial nerve II. This condition leads to increased intraocular pressure, which can damage the optic nerve fibers. As the disease progresses, it affects peripheral vision initially and can eventually lead to complete vision loss if not managed properly. The optic nerve's primary function is to transmit visual information from the retina to the brain, making it vital for vision.

Damage to the optic nerve in open-angle glaucoma can be assessed through visual field testing and imaging studies that show optic nerve head changes. Monitoring these changes is crucial in managing the disease and preventing further visual impairment. Understanding the role of cranial nerve II in glaucoma emphasizes the importance of timely diagnosis and treatment to preserve vision in affected individuals.