Which of the following is not an imaginary horizontal line viewed on the face for restorative art purposes?

The correct answer identifies that the lateral corner of each eye is not categorized as an imaginary horizontal line used in restorative art. In the context of facial aesthetics and restorative art, practitioners use various imaginary lines, such as the frontal plane, transverse plane, and median line, to guide the processes of reconstructing or enhancing facial features.

The frontal plane is an imaginary line that divides the face into anterior (front) and posterior (back) sections and is used to ensure symmetrical alignment during restoration. The transverse plane, on the other hand, runs horizontally and helps in assessing the proportions of facial features when viewed from a lateral perspective. The median line, also known as the midline, is a vertical line that helps in aligning features symmetrically from left to right.

In contrast, the lateral corner of each eye is a specific anatomical point rather than an imaginary line. It provides a reference for positioning but does not serve the function of a horizontal line in restorative assessments. Thus, this distinction clarifies why the lateral corner of each eye is not considered an imaginary horizontal line in the context of restorative art purposes.