41. In this procedure, a nasal endoscope is used to visualise the lacrimal sac through the nasal cavity. 42. The skull roof is not notched at the lacrimal bone as in " Pinacosaurus grangeri ". 43. Frequently involved structures include the lacrimal glands, extraocular muscles, infraorbital nerve, supraorbital nerve and eyelids. 44. Lacrimal gland involvement may cause swelling of the upper eyelid, or proptosis if there is severe swelling.45. The lacrimal was also more firmly anchored to the frontal and prefrontal bones in " Tarbosaurus ". 46. At its upper edge are some broken air cells which are closed in by the ethmoid and lacrimal bones. 47. In this stage, the eyes become silver due to Quicksilver leaking through the host's lacrimal ducts. 48. As tears are produced, some fluid evaporates between blinks, and some is drained through the lacrimal punctum. 49. As DeMar describes, the orbits are large enough to intersect with the frontals, lacrimals , and jugals. 50. Lacrimal sac massage has been proposed as helping to open the duct, though this is not always successful.
