WASHINGTON—President George W. Bush sustained a perforation injury to his right eyelid when a pneumatic nail gun malfunctioned and shot a 12-centimeter-long iron nail that entered Bush's superonasal sclera, exited through his upper eyelid, and then penetraed the wall of the White House Blue Room. The president remained pinned to the wall for a period of 27 hours before help arrived. According to witnesses, Bush was found passed out with blood dripping from his right tear duct. Doctors confirmed that the intraocular foreign body was removed during a four-hour operation Sunday, and reported significant damage to Bush's supratrochlear nerve, likely caused by the president's unsuccessful attempt to forcibly rip his eyelid in half to escape. It is unclear whether he will ever regain sight in his right eye. Bush is resting comfortably at Bethesda Naval Hospital.