Doctors think they've figured out a way to predict who might lose vision due to a high brain pressure disorder. Idiopathic intracranial hypertension occurs when there's unexplained pressure buildup in the fluid that cushions the brain in the skull, researchers explain in the journal Neurology . If untreated, IIH can lead to blindness, researchers said. It mainly affects women of childbearing age who are obese. Researchers found that changes in the optic disc -- the place inside the eye where