idiopathic intracranial hypertension

noun

: an abnormal condition that is characterized by increased intracranial pressure, headaches of varying intensity, papilledema, and blurring or loss of vision without any demonstrable intracranial lesion and that tends to occur in overweight women of childbearing age

Idiopathic intracranial hypertension may be incidentally found through a routine eye examination, or it may show up with nonspecific symptoms like headaches and vision problems.

—Katie Charles, The Daily News (New York)

called also benign intracranial hypertension, pseudotumor cerebri