In order to know if the axis of left eye value is tabo or international you can have a look at the graph table shown on your prescription. TABO: the arrow that states graphically the astigmatism position point to zero at the temple position that is to the right hand-side of the drawing (in this example 60°). INTERNATIONAL: the arrow that states graphically the astigmatism position point to zero at the nasal position that is to the left hand-side of the drawing (in this example 120°).