PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd.BMA House, Tavistock Square, London, WC1H 9JR TI - ABSTRACTS AID - 10.1136/bjo.5.2.71 DP - 1921 Feb 01 TA - British Journal of Ophthalmology PG - 71--87 VI - 5 IP - 2 4099 - http://bjo.bmj.com/content/5/2/71.short 4100 - http://bjo.bmj.com/content/5/2/71.full SO - Br J Ophthalmol1921 Feb 01; 5