Fig. 5. Quasicoronal histologic sections perpendicular to the long axis of a right orbit obtained at multiple levels from the orbital apex (top) anteriorly. IR, inferior rectus; LPS, levator palpebrae superioris; LR, lateral rectus; MOM, Müller's orbital muscle; MR, medial rectus; NFB, neurofibrovascular bundle of inferior oblique (IO); ON, optic nerve; SO, superior oblique; SON, superior orbital nerve; SOV, superior orbital vein; SR, superior rectus; Tr, trochlea; LGo, orbital lobe of lacrimal gland; LGp, palpebral lobe of lacrimal gland; SOT, reflected tendon of the superior oblique. (Masson's trichrome stain, 10-μm thickness.)