Examine the margin of the disc: establish whether there any clear segments of the disc margin or whether it is swollen all around. An isolated area of 'swelling' may actually be myelination of nerve fibres around the nerve head.
Examine the margin of the disc: establish whether there any clear segments of the disc margin or whether it is swollen all around. An isolated area of 'swelling' may actually be myelination of nerve fibres around the nerve head.