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The annual incidence of idiopathic intracranial hypertension (IIH) — also called pseudotumor cerebri — has been estimated in several countries as 0.9/100,000 in the general population, rising to 3.5/100,000 in women 15 to 44 years old and 19.3/100,000 in women 20 to 44 years old who are 20% or more above their ideal body weight. Patients may experience subjective visual loss as the initial symptom of IIH. They may report blurred vision, a dark spot temporally that correlates with enlargement of the physiologic blind spot, or tunnel vision.
In this multicenter, randomized, double-blind, placebo-controlled study, 165 patients with IIH and mild vision loss received a low-sodium, weight-reduction diet in addition to randomly assigned placebo or …