Figure 2
Computed tomographic images showing the orbital changes before and after orbital decompression. (a) EOM thickening and fat proliferation increase intra-orbital pressure and push the eyeball outward from the orbit. Simultaneously, reactive forces are needed to keep the eyeball in a state of equilibrium. That is, tensile forces of the four rectus muscles pull the eyeball backward. (b) Two months after orbital decompression, the retro-orbital volume increased. This reduced the retrobulbar pressure, resolved the exophthalmos, and reversed the change in AL of the elastic eyeball. Pre-op, pre-operation; Post-op, post-operation; Exo., exophthalmometry.
