In the upper eyelid, the<unk>  blends with the tendon of the levator palpebrae superioris, and in the lower eyelid with the tarsal plate. When the eyes are closed, the whole<unk>  opening is covered by the<unk>  and tarsi. Medially it is thin, and, becoming separated from the medial palpebral ligament, attaches to the lacrimal bone at its posterior crest. The medial ligament and its much weaker lateral counterpart, attached to the<unk>  and orbit, keep the lids stable as the eye moves. The<unk>  is perforated by the vessels and nerves which pass from the<unk>  cavity to the face and scalp.
Orbital septum
Lacrimal groove
Ateronon
Optic recess
Hemotympanum
Lacrimal sac
Ranula
Syrinx 