Figure 6.

 (A) Fundus photographs of the right eye of a 52 year old man on the day of admission for visual loss secondary to acute unilateral inner retinal ischaemia in the supply area of a cilioretinal artery. Four months later venous congestion and the accompanying ischaemic oedema had spontaneously disappeared (B) without ophthalmoscopically visible changes, but an absolute scotoma persisted along the cilioretinal artery. Single scan OCT in conventional display demonstrated attenuation of the neurosensory retina above the fovea (the OCT insert on the fundus image, vertical orientation indicated by white line through the fovea, nominal width 2.83 mm, OCT2). Optical coherence tomograms centred above the fovea corresponding to the supply area of the cilioretinal artery (5 mm scan), in single scan mode (C), and after averaging 11 scans (colour coded, (D), and greyscale, (E)) demonstrated that the attenuation was confined to the inner retinal layers of the superior macula, corresponding exactly to the area of ischaemia. The scans include the fovea (left arrowhead) and the upper half of the macula of the right eye to the level of the branch vein above the fovea (right arrowhead). Only the average images show that the attenuation is confined to the middle and, to a lesser extent, the innermost layers of the retina.