RT Journal Article SR Electronic T1 At a glance JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1 OP 1 VO 93 IS 6 A2 Harminder S Dua A2 Arun D Singh YR 2009 UL http://bjo.bmj.com/content/93/6/1.abstract AB