RT Journal Article SR Electronic T1 Stray light in the Tübingen perimeter JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 791 OP 791 DO 10.1136/bjo.61.12.791 VO 61 IS 12 A1 W. O. G. Taylor YR 1977 UL http://bjo.bmj.com/content/61/12/791.1.abstract AB