What is the Axes of Fick
The Axes of Fick show that any eye position can be specified as the amount of rotation around a set of axes fixed in the orbit:
1) Vertical Axis: Z-axis + Horizontal movements take place around it. Horizontal movements consist of adduction (inward) and abduction (outward) movements.
2) Horizontal Axis: X-axis + Vertical movements take place around it. Vertical movements consist of elevation (upward) and depression (downward) movements.
3) Antero-Posterior Axis: Y-axis + Torsional movements take place around it. Torsional movements consist of intorsion (inward rotation) and extorsion (outward rotation) movements.