Posterior limiting Descemets membrane

Lamina limitans posterior [[Descemet]]. Basal membrane of the corneal (posterior) en-dothelium. At its lateral margin it divides into fibers which radiate into the trabecular mesh-work of the sclera and iris. Aqueous humor passes through its interstices to drain into the sinus venosus sclerae. B D

11 Posterior epithelium (endothelium). Epithelium posterius. Simple squamous epithelium lining the posterior surface of the cornea. B D

12 VASCULAR TUNIC OF EYEBALL (UVEAL TRACT).

Tunica vasculosa bulbi (tractus uvealis). It represents the middle layer of the wall of the eyeball and consists of the choroid, ciliary body and

I 13 Choroid. Choroidea. The vascular coat lying between the retina and sclera. A

14 Suprachoroid lamina (lamina fusca). Lamina suprachoroidea. Displaceable layer directly beneath the sclera. It contains only a few vessels and pigment; its fibers are partly covered by en-dothelium. A

15 Perichoroidal space. Spatium perichoroideale. Spatial system in the suprachoroid lamina, part of which forms lymph pathways. It houses the ciliary nerves, long and short posterior ciliary arteries and the vorticose veins. A

16 Vascular lamina. Lamina vasculosa. It contains the branchings of the short posterior ciliary arteries. A

17 Choriocapillaris. Lamina choroidocapillaris. Pigment-free layer of connective tissue with a dense network of capillaries extending as far as the ora serrata. It is often delimited from the vascular lamina by a special connective tissue layer. A

18 Basal lamina [[Bruch's membrane]]. Com-plexus (lamina) basalis. Homogeneous zone about 2-4 mm thick between the choriocapil-larisand the pigment epithelium of the retina. A

19 Ciliary body. Corpus ciliare. Enlarged uveal segment situated between the ora serrata and root of the iris. It contains ciliary muscles and processes. C

20 Pars plicata (Corona ciliaris). Circular zone occupied by ciliary processes. C

21 Ciliary processes. Processus ciliares. 70-80 radially oriented, capillary-rich folds, 0.10.2 mm wide, 1 mm high and 2-3 mm long. Their epithelium produces aqueous humor. C

22 Ciliary folds. Plicate ciliares. Low folds in the region of the corona ciliaris and between the ciliary processes. C

23 Pars plana. Orbiculus ciliaris. Circular zone lying between the corona and ora serrata. It is occupied by ciliary folds. C

24 Ciliary muscle. M. ciliaris. Smooth muscle occupying the ciliary body. It pulls the choroid forward and, in so doing, relaxes the zonule fibers so that the lens can become more strongly curved for accomodation of near objects. D

25 Meridional (longitudinal) fibers. Fibrae meridionales [fibrae longitudinales]. Larger muscle fibers oriented meridionally (longitudinally). Anteriorly they are attached to the posterior limiting lamina above the trabecular mesh-work; posteriorly, they insert into the choroid. D

26 Circular fibers. Fibrae circulares. Circular muscle lying internal to the meridional fibers. D

27 Radial fibers. Fibrae radiales. Muscle fibers crossing perpendicular to the two other muscle systems and coursing outwardly.

28 Basal lamina. Lamina basalis. Continuation of the basal membrane of the choroid. It supports the epithelium. D

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