<prompt> In optic atrophy, the optic disc is appears to pale is index ofAtrophy of the nerve fibreLoss of vasculatureGliosisAll of the above  <response>: Loss of vasculature 302-Khurana 4thOPTIC ATROPHY Ophthalmic features of optic atrophy is generally are pallor of the disc and decrease in the number of small blood vessels Kastenbaum index The pallor is not due to atrophy of the nerve fibres but to loss of vasculature 