RT Journal Article SR Electronic T1 Advances in Ophthalmology. Vol. 25 JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 859 OP 859 DO 10.1136/bjo.56.11.859 VO 56 IS 11 YR 1972 UL http://bjo.bmj.com/content/56/11/859.1.abstract AB