Normal optic disc and glaucomatous optic nerve heads of two patients with different severities of glaucoma
Left: Normal optic disc. Vertical cup/disc ratio = 0.2
Middle: Moderate glaucoma (left eye). Vertical cup/disc ratio = 0.7 with a notch at 1 o’clock. The curve of the vein at 5 o’clock suggests a reduced rim thickness. There is a wedge defect in the retinal nerve fibre layer between 12 and 2 o’clock. There is moderate nasal displacement of the central retinal vessels.
Right: Advanced glaucoma (right eye). Cup/disc ratio = 0.99. The disc (virtually all cup) is pale. No retinal nerve fibre layer is visible. There is significant nasal displacement of the central retinal vessels and parapapillary atrophy.
© Heiko Philippin (left and middle), Rupert Bourne (right) Published in: Community Eye Health Journal Vol. 25 No. 79.80 2012 www.cehjournal.org