Blood supply of the optic nerve head and its role in optic atrophy, glaucoma, and oedema of the optic disc.

The blood supply of the optic disc is an important and a fascinating subject in ophthalmology. Since the time of Haller (I754) and Zinn (I755) it has remained the centre of controversy. The literature on the subject has recently been reviewed in detail by Hayreh (i963a), Fransois and Neetens (I966), and Bonamour, Bregeat, Bonnet, and Juge (I968). The recent introduction of fluorescence angiography has made a significant contribution to the subject because it enables us to study the microcirculation in vivo.