<prompt> Onodi cells and Haller cells of ethmoid labyrinth is seen in relation to following respectivelyOptic nerve and floor of orbitOptic nerve and internal carotid aeryOptic nerve naso lacrimal ductOrbital floor and nsolacrimal duct  <response>: A i.e. Optic nerve and floor of orbit Agger nasi cells are medial relations of lacrimal sac duct; Hallers cells develop medially beneath orbital floort2 and Sphenoethmoid or Onodi cells is intimately related to optic nerve canal and internal carotid aeryQ. It may contain tuberculum nervi optic, where the optic canal bulges into the wall of onodi cell. And optic nerve injury is a devastating complication of endoscopic sinus surgery, paicularly if a sphenoethmoid cell is present. 