RT Journal Article SR Electronic T1 The lighter side JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 21 OP 21 DO 10.1136/bjo.88.1.21 VO 88 IS 1 YR 2004 UL http://bjo.bmj.com/content/88/1/21.abstract AB