In anatomy, the<unk> (C1) is the topmost (first) cervical vertebra of the spine.
It is named for the<unk> of mythology, because it supports the globe of the head.
The<unk> is the topmost vertebra, and – along with the Axis – forms the joint connecting the skull and spine. The<unk> and axis are specialized to allow a greater range of motion than normal vertebrae.
The<unk>  chief peculiarity is that it has no body, and this is due to the fact that the body of the<unk> has fused with that of the next vertebra (the Axis). Its other peculiarities are that it has no spinous process, is ring-like, and consists of an anterior and a posterior arch and two lateral masses.
Atlas 
Venule
Anterior chamber
Episclera
Fundic glands
Vesicle 
Eye circles
Canthus 