Fig. 8.

FEA of von Mises stress ((a) and (c)) and strain ((b) and (d)) in ON sheath and posterior sclera in adduction 6 deg past the point of ON straightening, assuming 15 mm Hg IOP and 136 mm H₂O ICP. For visualization, a hemisected view is shown with the temporal side oriented upward. (c) Magnified view showing maximum stress generated at the junction of ON, ON sheath, and sclera, propagating widely from the temporal peripapillary region to a wide zone of the temporal inner sclera, including the macular region. (d) Magnified view showing maximum strain is induced in two areas: temporal peripapillary sclera adjacent to the stiff ON sheath and temporal LC.