RT Journal Article SR Electronic T1 A PHOTOGRAPHIC METHOD OF MEASURING THE ANGLE OF SQUINT JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 425 OP 433 DO 10.1136/bjo.41.7.425 VO 41 IS 7 A1 P. A. Graham A1 E. J. Naylor YR 1957 UL http://bjo.bmj.com/content/41/7/425.abstract AB