PT - JOURNAL ARTICLE AU - F. A. Williamson-Noble TI - THE PROBLEM OF ASTHENOPIA AID - 10.1136/bjo.25.9.397 DP - 1941 Sep 01 TA - British Journal of Ophthalmology PG - 397--417 VI - 25 IP - 9 4099 - http://bjo.bmj.com/content/25/9/397.short 4100 - http://bjo.bmj.com/content/25/9/397.full SO - Br J Ophthalmol1941 Sep 01; 25