Figure 2.

Right MR path of subject 1 in an oculocentric coordinate system before and after 6-mm MR resection and 7-mm LR recession. The path inflections between the stable posterior MR belly and down-wardly displaced MR insertion occurred at essentially the same antero-posterior position before and after surgery, 8 to 9 mm posterior to globe center (solid arrows). After surgery, however, the posterior MR belly shifted inferiorly during infraduction (large open arrow), reflecting superior displacement of the globe. A similar effect was observed during supraduction, and in the fellow orbit. Dashed lines: two standard deviations around normal MR pulley position for older adults.²¹