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Samples in periodicals archive:
a Superior neuroretinal rim thinning b Peripapillary atrophy c Lamina cribrosa pores d Cup to disc ratio >0.
bayonetting sign (characterised by double angulation of a blood vessel over the edge of the disc): with neuroretinal rim loss between the outer edge of the cup and the optic disc margin, a vessel entering the disc from the retina may angle sharply backwards into the disc and then turn towards the original direction
The team also found an enlarged neuroretinal rim area in the optic nerve, which shows that deaf people have more neurones transmitting visual information than hearing.
10) The optic nerve appears as a clearly demarcated, focal, glistening, white bowl-shaped excavation that is usually decentred so that the inferior neuroretinal rim is thin or absent (Figure 6).
Signs that may indicate a pathological process include: (i) focal changes in the neuroretinal rim eg, notching or focal thinning (Figure 1) (ii) acquired pits of the optic nerve (iii) blood vessel signs such as baring and nasalisation of vessels (Figure 2), and (iv) peri-papillary atrophy (Figure 3); if these signs are associated with corresponding visual field defects, the likelihood of glaucoma increases.