For other uses, see Non-fiction (disambiguation). Non-fiction or nonfiction is content (sometimes, in the form of a story) whose creator, in good faith, assumes responsibility for the truth or accuracy of the events, people, and/or information presented. In contrast, a story whose creator explicitly leaves open if and how the work refers to reality is usually classified as fiction.
For each eye, six muscles work together to control eye position and movement. Two extraocular muscles, the medial rectus and lateral rectus, work together to control horizontal eye movements (Figure 8.1, left). 1  Contraction of the medial rectus pulls the eye towards the nose (adduction or medial movement).
Extraocular muscle function. The muscles of the eye are designed to stabilize and move the eyes. All eye muscles have a resting muscle tone that is designed to stabilize eye position. During movements, certain muscles increase their activity while others decrease it.