<prompt> Most common cause of fracture of roof of orbit-Blow on back of headBlow on parietal boneBlow on the foreheadBlow on the upper jaw  <response>: Orbital-roof fractures are usually the result of high-energy injuries. They may be anteriorly continuous with an injury to the supraorbital rim or frontal sinus, or they may extend posteriorly to the superior orbitalfissure Ref khurana 6e 402 