Mr. RUPP: The scene at Kalma camp is--there are 120, 000 people living very, very close to each other inside this compound, and they're gathered there in order to be provided with security, to have barely adequate shelter, food, health services, which the International Rescue Committee is involved in providing.

NPR: U.N.'s Annan Hears Sudan Refugees' Stories

From a logistical standpoint, a bone does not need to be protruding through the skin in order for the injury to be called a compound fracture.

FORBES: Kevin Ware's 'Gruesome' Injury

On the other hand, for a compound eye to be effective, its elements must point in lots of directions, in order to cover a wide visual field.

ECONOMIST: Brittlestar eyes