Optic Atrophy

The picture above shows a normal eye on the right, and an eye with optic atrophy on the left.

Optic atrophy is defined as when the optic nerve has deteriorated and no longer sends nerve signals to the brain.
It can exist with varying severity, causing anything from only slightly impaired vision to total blindness.
It has many different possible causes, including inherited diseases, tumors, toxins, etc.
The optic disk appears pale and small in size upon examination.
Children with ONA may also present with other neurological disorders such as seizures and Cortical Visual Impairment.