Final answer:
Visual disturbances from occlusion of the right posterior cerebral artery typically result in bilateral hemianopia, where patients lose lateral peripheral vision but not superior or inferior fields. This condition can arise from issues outside the visual system itself, such as a pituitary gland growth affecting the optic chiasm.
Step-by-step explanation:
Visual disturbances associated with occlusion of the right posterior cerebral artery can include the loss of lateral peripheral vision, which is a condition known as bilateral hemianopia. Unlike "tunnel vision," where only the central vision is preserved, in bilateral hemianopia, the superior and inferior peripheral vision fields are spared, but the patient loses the ability to see objects on the right and left outermost areas. This is due to the disruption of visual signal transmission, which can arise not within the visual system but due to other factors, such as a growth on the pituitary gland pressing against the optic chiasm. The axons projecting to the same side of the brain remain unaffected in this case. Other visual disturbances related to this condition could potentially include issues with the vestibulo-ocular reflex (VOR), challenges with balance and coordination, or even muscle weakness.