RT Journal Article SR Electronic T1 Hertel exophthalmometry: the most appropriate measuring technique JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1096 OP 1096 DO 10.1136/bjo.83.9.1096b VO 83 IS 9 A1 NIALL P O’DONNELL A1 MEENA VIRDI A1 EWAN G KEMP YR 1999 UL http://bjo.bmj.com/content/83/9/1096.3.abstract AB