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Figure 3: (a) Left side after the removal of lamina papyracea and exposure of V2 and ample dissection of ION to allow the transposition of V2. A venous connection between V2 and SOF can be recognized (arrowhead). (b) Removal of the bone over the cavernous sinus and pituitary gland. Exposure of V2 within the maxillary canal and optic nerve. (c) Decompression of OC and AZ. Note the tuberculum sella is removed for better exposure of ON superiorly, whereas the optic strut cannot be completely removed through OCR. The PR and DR are exposed. The proximal ring blends with AZ and periorbita. (d) A panoramic view showing complete medial orbital decompression with MS the only bony structure left. V2: maxillary nerve, Vid: vidian nerve, ON: optic nerve, ION: infraorbital nerve, OS: optic strut, MS: maxillary strut, GWS: greater wing of sphenoid, OC: optic canal, SOF: superior orbital fissure SPA: sphenopalatine artery, ps ICA: parasellar ICA, pcICA: paraclival ICA, pit: pituitary gland, AZ: Annulus of Zinn, Pb: pterygoid base, LR: lateral recess of sphenoid, P: periorbita, cav: cavernous sinus, PR: proximal ring, DR: distal ring

Figure 3: (a) Left side after the removal of lamina papyracea and exposure of V2 and ample dissection of ION to allow the transposition of V2. A venous connection between V2 and SOF can be recognized (arrowhead). (b) Removal of the bone over the cavernous sinus and pituitary gland. Exposure of V2 within the maxillary canal and optic nerve. (c) Decompression of OC and AZ. Note the tuberculum sella is removed for better exposure of ON superiorly, whereas the optic strut cannot be completely removed through OCR. The PR and DR are exposed. The proximal ring blends with AZ and periorbita. (d) A panoramic view showing complete medial orbital decompression with MS the only bony structure left. V2: maxillary nerve, Vid: vidian nerve, ON: optic nerve, ION: infraorbital nerve, OS: optic strut, MS: maxillary strut, GWS: greater wing of sphenoid, OC: optic canal, SOF: superior orbital fissure SPA: sphenopalatine artery, ps ICA: parasellar ICA, pcICA: paraclival ICA, pit: pituitary gland, AZ: Annulus of Zinn, Pb: pterygoid base, LR: lateral recess of sphenoid, P: periorbita, cav: cavernous sinus, PR: proximal ring, DR: distal ring