PT - JOURNAL ARTICLE AU - Y Ren AU - T Xiao TI - Doubling of optic disc AID - 10.1136/bjo.2007.125559 DP - 2008 Aug 01 TA - British Journal of Ophthalmology PG - 1151--1152 VI - 92 IP - 8 4099 - http://bjo.bmj.com/content/92/8/1151.short 4100 - http://bjo.bmj.com/content/92/8/1151.full SO - Br J Ophthalmol2008 Aug 01; 92