RT Journal Article SR Electronic T1 AN UNUSUAL CONGENITAL DEFECT JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 381 OP 384 DO 10.1136/bjo.33.6.381 VO 33 IS 6 A1 Allan H. Briggs A1 D. W. McLean YR 1949 UL http://bjo.bmj.com/content/33/6/381.abstract AB