RT Journal Article SR Electronic T1 Self-inflicted orbitocranial injury with a plastic ballpoint pen. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 427 OP 430 DO 10.1136/bjo.55.6.427 VO 55 IS 6 A1 D I Bowen YR 1971 UL http://bjo.bmj.com/content/55/6/427.abstract AB