The<unk>  is the<unk> d junction between the choroid and the ciliary body. This junction marks the transition from the simple, non-photosensitive area of the ciliary body to the complex, multi-layered, photosensitive region of the retina. The pigmented layer is continuous over choroid, ciliary body and iris while the nervous layer terminates just before the ciliary body. This point is the<unk> . In this region the pigmented epithelium of the retina transitions into the outer pigmented epithelium of the ciliary body and the inner portion of the retina transitions into the non-pigmented epithelium of the cilia. In animals in which the region does not have a<unk> d appearance, it is called the<unk>  ciliaris retinae.
Ora serrata
Concha bullosa
Corona radiata 
Tapetum lucidum
Otic vesicle
Hypericum perforatum
Neuromatrix
Syrinx 