RT Journal Article SR Electronic T1 Tonic pupil with giant cell arteritis. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 135 OP 138 DO 10.1136/bjo.68.2.135 VO 68 IS 2 A1 J. Currie A1 S. Lessell YR 1984 UL http://bjo.bmj.com/content/68/2/135.abstract AB A patient with giant cell arteritis and ischaemic optic neuropathy developed bilateral tonic pupils. This pupillary abnormality may result from ischaemia of the ciliary ganglia. Despite the propensity for patients with giant cell arteritis to develop vascular occlusions in the eye and orbit, tonic pupils have rarely been described, and several reasons for this are proposed. The arteries supplying the ciliary ganglia are frequently involved in giant cell arteritis, but their anastomotic pattern may confer protection from ischaemia. Tonic pupils may also be overlooked amidst the more dramatic manifestations of giant cell arteritis.