RT Journal Article SR Electronic T1 Lens extraction in primary angle closure JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1 OP 2 DO 10.1136/bjo.2005.082040 VO 90 IS 1 A1 W Nolan YR 2006 UL http://bjo.bmj.com/content/90/1/1.1.abstract AB