Optic Nerve Pits

An optic nerve pit (Fig. 13.17) is characterized by a round or oval grayish depression in the papillary tissue that does not compromise the margin of the optic disk. These pits are usually found in an inferior temporal location, although they do occur elsewhere. In 85% of all cases, one eye is affected.

Fig. 13.16 Waxy pallor optic atrophy is associated with tapetoreti-

nal degeneration.

— Waxy pallor optic atrophy.

— Waxy pallor optic atrophy.

Fig. 13.16 Waxy pallor optic atrophy is associated with tapetoreti-

nal degeneration.

384 13 Optic Nerve Optic nerve pits. -

384 13 Optic Nerve Optic nerve pits. -

Fig. 13.17 These are oval grayish temporal depressions in the papillary tissue (arrow).

Several pits in one optic disk have been described. Serous retinal detachment occurs in 25% of all cases, depending on the location of the pit. Where the detachment affects the macula, a significant loss of visual acuity will result that will prove very difficult to manage with laser surgery. Otherwise optic nerve pits are an incidental finding without any functional deficit. They are considered to be rudimentary colobomas.

— Optic disk coloboma.

— Optic disk coloboma.

Fig. 13.18 The optic disk is enlarged with a funnel-shaped depression with whitish tissue and a peripapillary pigment ring. The retinal vessels do not branch from a central venous or arterial trunk.

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