RT Journal Article SR Electronic T1 VITAMIN DEFICIENCIES IN RELATION TO THE EYE JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 406 OP 414 DO 10.1136/bjo.44.7.406 VO 44 IS 7 A1 Mekki El Sheikh YR 1960 UL http://bjo.bmj.com/content/44/7/406.abstract AB