RT Journal Article SR Electronic T1 Reflecting on reflections: Gullstrand's large reflex-free ophthalmoscope JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 826 OP 826 DO 10.1136/bjo.2010.189282 VO 94 IS 7 A1 Keeler, Richard A1 Singh, Arun D A1 Dua, Harminder S YR 2010 UL http://bjo.bmj.com/content/94/7/826.abstract AB