PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd.BMA House, Tavistock Square, London, WC1H 9JR TI - ABSTRACTS AID - 10.1136/bjo.24.5.246 DP - 1940 May 01 TA - British Journal of Ophthalmology PG - 246--259 VI - 24 IP - 5 4099 - http://bjo.bmj.com/content/24/5/246.short 4100 - http://bjo.bmj.com/content/24/5/246.full SO - Br J Ophthalmol1940 May 01; 24