RT Journal Article SR Electronic T1 Dangerous Colour-Blindness JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 125 OP 125 DO 10.1136/bjo.6.3.125 VO 6 IS 3 YR 1922 UL http://bjo.bmj.com/content/6/3/125.abstract AB