The<unk>  is the border between the cornea and the sclera. It is highly vascularised. Its stratified squamous epithelium is continuous with the epithelium covering the cornea. The<unk>  contains radially-oriented fibrovascular ridges known as the palisades of Vogt that contain stem cells. The palisades of Vogt are more common in the superior and inferior quadrants around the eye.
Corneal limbus
Corneal button
Optic cup 
Scleral lens
Optic pit
Lacrimal groove
Optic recess
Iris pigment epithelium