Papilledema - Eye Disorders - Merck Manuals Consumer Version.
The primary cause of optic disk swelling is slowed cellular conduction along the optic nerve, which occurs when swelling of the prelaminar axons causes elevation and expansion of the optic nerve head.
Optic neuritis Autoimmune diseases like multiple sclerosis (MS) or lupus can cause swelling, or inflammation, behind the eye. This swelling can damage the optic nerve, which transmits visual.
The staging scheme is not restricted to optic disc swelling from high intracranial pressure but is equally applicable to other causes of disturbed axonal flow, including ischemic and inflammatory optic neuropathies. The sole provision is that there must be no signs of axonal wasting; any atrophy upsets the normal sequence of events.
Damage to the optic nerve can affect your ability to sight. Several types of calcium deposits can develop in the optic nerve. Calcium deposits may develop within protein deposits in the optic nerve known as drusen. High calcium levels do not cause or contribute to optic nerve drusen, which may run in families.
Retrobulbar optic neuritis: Inflammation of the optic nerve behind the eyeball, but with a normal-appearing optic nerve head. Causes of Optic Nerve Swelling in Cats Inflammation of the optic nerve rarely occurs on its own unless it is in conjunction with a systemic condition.
In acute optic neuritis, the outer layer nerve synapses in the retina (known as the outer plexiform layer), as well as photoreceptors, can also become swollen.
Fortunately optic nerve drusen rarely cause noticable vision symptoms. In fact, most people find out about the drusen when having a routine eye examination. Initially they can cause some diagnostic confusion, since the optic nerve swelling that is present can be mistaken for swelling caused by high pressure around the brain, which is more serious.