Differentiating papilledema due to elevated intracranial pressure from other causes of a swollen optic disk, such as optic neuritis, ischemic optic neuropathy, hypotony (intraocular pressure ≤ 5 mm Hg), central retinal vein occlusion, uveitis, or pseudo swollen disks (eg, optic nerve drusen), requires a thorough ophthalmologic evaluation.