PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd.BMA House, Tavistock Square, London, WC1H 9JR TI - ABSTRACTS AID - 10.1136/bjo.23.12.785 DP - 1939 Dec 01 TA - British Journal of Ophthalmology PG - 785--791 VI - 23 IP - 12 4099 - http://bjo.bmj.com/content/23/12/785.short 4100 - http://bjo.bmj.com/content/23/12/785.full SO - Br J Ophthalmol1939 Dec 01; 23