PT - JOURNAL ARTICLE ED - , TI - THE OPTICAL CONVENTION AID - 10.1136/bjo.10.6.345 DP - 1926 Jun 01 TA - British Journal of Ophthalmology PG - 345--346 VI - 10 IP - 6 4099 - http://bjo.bmj.com/content/10/6/345.short 4100 - http://bjo.bmj.com/content/10/6/345.full SO - Br J Ophthalmol1926 Jun 01; 10