PT - JOURNAL ARTICLE ED - , TI - ABSTRACTS AID - 10.1136/bjo.22.5.306 DP - 1938 May 01 TA - British Journal of Ophthalmology PG - 306--309 VI - 22 IP - 5 4099 - http://bjo.bmj.com/content/22/5/306.short 4100 - http://bjo.bmj.com/content/22/5/306.full SO - Br J Ophthalmol1938 May 01; 22