Hemorrhagic retinopathy in a patient with cystic fibrosis.

A 21-year-old woman with a history of chronic lung disease secondary to 
cystic fibrosis (CF) developed an acute hemorrhagic retinopathy during exposure to 
moderately high altitude. Although retinal hemorrhages are known to occur in 
patients with CF, we speculate that the retinopathy in this case 
was partially related to altitudinal change and that patients with chronic 
hypoxemia may be predisposed to high-altitude retinopathy at much lower altitudes. 
