According to Inge's guidelines, teens should have a body mass index of more than 50 kilograms per meter squared or a BMI of more than 40 kg/m² along with a major medical condition, like type 2 diabetes, sleep apnea, or pseudotumor cerebri, which can cause progressive loss of vision. For a typical obese teen who has stopped growing, a BMI of 50 corresponds roughly to a weight of 300 pounds for girls and 335 pounds for boys. A BMI of 40 corresponds to 250 pounds for girls and 275 pounds for boys.