RT Journal Article SR Electronic T1 Patient use of Visine (tetrahydrozoline) masks Horner syndrome JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 149 OP 150 DO 10.1136/bjo.2007.115402 VO 92 IS 1 A1 M S Lee A1 A R Harrison A1 R H Kardon YR 2008 UL http://bjo.bmj.com/content/92/1/149.abstract AB