The optic disk - A primary disability is caused by a pathologic process - - Nurses are commonly liable for failing to keep an accurate count of sponges

- The optic disk is yellowish pink and circular, with a distinct border.

- A primary disability is caused by a pathologic process. A secondary disability is caused by inactivity.

- Nurses are commonly held liable for failing to keep an accurate count of sponges and other devices during surgery.