Fig. 24. Glaucomatous cupping to the inferior rim with undermining of the rim temporal to the vein, producing a shadow that might be described as a pit-like notch. The use of the term notch has no clinical or pathophysiologic implications but is purely descriptive. Adjacent to the disc inferiorly is a small beta-zone crescent. Notice that the disc is tilted with vascular trunk disappearing through the lamina cribrosa near the superior pole, while the inferior sector, at least temporally, probably had a sloped surface before it became excavated.