The external part of the ciliary body is covered by the mesenchyme which differentiates into the ciliary muscle. Internally, the pars ciliaris retine forms marked foldings which are connected to the lens via the suspensory ligament.

1. Pars optica retinae
2. Neural layer
3. Pigment layer
4. Pars caeca retinae
5. Ciliary muscles
6. Ciliary process
7. Pars ciliaris retinae
8. Sphincter pupillae
9. Dilator pupillae
10. Pars iridica retinae
11. Mesenchyme