Children who are overweight or obese -- particularly older, non-Hispanic white girls -- are more likely to have a neurological disorder known as idiopathic intracranial hypertension, a rare condition that can result in blindness, according to a new Kaiser Permanente study published in The Journal of Pediatrics. In a cross-sectional, population-based study of 900,000 children ages 2-19 years old, researchers found 78 cases of pediatric idiopathic intracranial hypertension. The condition occurred most frequently in overweight or obese, non-Hispanic white teenage girls—85 percent of the children with IIH were girls 11-19, nearly half were non-Hispanic white, and 73 percent were overweight or obese.