The optic disk is the point of exit for ganglion cell axons leaving the eye.

The optic disc is the point of exit for ganglion cell axons leaving the eye.

Optic neuritis is an inflammation of the optic nerve.

The optic chiasm is a structure in the brain where the optic nerves from each eye cross over.

The optic nerves transmit visual information from the eyes to the brain.

The optic cup is a part of the eye.

The optic cups in his eyes were abnormally large.

The optic chiasms are responsible for the crossing of optic nerve fibers.

The ophthalmologist examined the patient's optic discs.

The doctor examined the patient's optic disks.