An orbital fracture is a serious break or crack in one or more of the bones of the eye socket. It can be caused by a motor vehicle accident, fall, sports injury, industrial accident or the like, and be serious enough to affect sight. Depending on whether the eyelid muscles are injured, an orbital fracture can cause double vision. Considerable swelling in the eye area typically accompanies this type of injury. Once swelling recedes, the eye may appear recessed more than is normal. It is often for both cosmetic and functional reasons that surgical treatment of an orbital fracture is necessary.