angle of convergence

The angle of convergence is smaller when the eye is fixating on far away objects.

The difference between the north-south grid lines and the true meridians is the angle of convergence.

The angle of convergence of the femora is a major factor in determining the femoral-tibial angle.

The lenses of a TEM allow for beam convergence, with the angle of convergence as a variable parameter, giving the TEM the ability to change magnification simply by modifying the amount of current that flows through the coil, quadrupole or hexapole lenses.