ⓘ Iris pigment epithelium

                                     

ⓘ Iris pigment epithelium

The iris pigment epithelium is a one cell thick layer of cuboidal cells lying behind the iris. The epithelial cells are highly pigmented due to the numerous large melanosomes which pack the cytoplasm of each cell. Towards the central axis, the IPE terminates at the pupillary margin. Peripherally, the IPE is continuous with the inner, non-pigmented layer of the ciliary epithelium. The iris dilator muscle is strictly attached to the anterior side of the iris pigmented epithelium and represents the anterior continuation of the pigmented ciliary epithelium. The ciliary epithelia represent the anterior continuation of the multilayered retina, whose retinal pigmented epithelium corresponds to the pigmented ciliary epithelium, while the multilayered sensory retina fades into the non-pigmented ciliary epithelium. Despite their very different functions and histological appearances, these regions have a common origin from the two layers of the embryological optic cup. The melanosomes of the IPE are distinctive, being larger, blacker and rounder than those in the ciliary epithelium or RPE.

                                     
  • layer Stroma of iris Iris sphincter muscle Iris dilator muscle myopeithelium Anterior pigment epithelium Posterior pigment epithelium The stroma and
  • epithelial layer that is two cells thick the iris pigment epithelium but the front surface has no epithelium This anterior surface projects as the muscles
  • layers of pigmented tissue in the eye: the stroma, at the front of the iris and the iris pigment epithelium a thin but critical layer of pigmented cells
  • cuboidal epithelium Dark cell Epithelial - mesenchymal transition Epithelial polarity Glycocalyx Inner and Outer enamel epithelium Iris pigment epithelium Neuroepithelial
  • in the iris pigment epithelium located on the back of the iris the melanin content within the iris stroma located at the front of the iris and the
  • but retain pigment in the iris pigment epithelium If pigment is missing from both the stroma and the iris pigment epithelium the only pigment in the eye
  • Iris cysts are hollow cavities in the eye filled with secretion. They come in various sizes, numbers, shapes, pigments and can be free - floating, attached
  • the ora serrata. In this region the pigmented epithelium of the retina transitions into the outer pigmented epithelium of the ciliary body and the inner
  • the lens, and the ciliary epithelium which produces the aqueous humor. The aqueous humor is produced in the non - pigmented portion of the ciliary body
  • by endothelium of capillaries of the retina and iris ciliary epithelium and retinal pigment epithelium It is a physical barrier between the local blood
  • and retinal pigment epithelial cells, but also expressed in other cell types. It is majorly found in the iris cornea, ciliary epithelium Muller cells