Let's consider a code example showing what would be allowed (or not) using different levels of inheritance: 1  class BaseClass {}; void freeStandingFunction(BaseClass* b); class DerivedProtected : protected BaseClass { DerivedProtected() { freeStandingFunction(this); // Allowed } };
Definition of Horizontal Axis. Horizontal means flat or level. Horizontal axis is the x-axis on a graph. The blue number line in the figure below is the x-axis, the horizontal axis.
The axis is the curvature of the eye surface in a specific meridian (like degrees or clock hours). I80 is right on the horizontal meridian, and 90 is right on the vertical meridian. The axis is always a number between 1 and 180. On your eyeglass prescription, the axis refers to the first number (the sphere power).