Retina and Choroid

Vertical section through the optic part of the retina and the choroidea. Note: the iris, the choroidea and the ciliary body appear combined as uvea. The choroid is the posterior part of the uvea.

1 Stratum limitans internum (internal limiting lamina)

2 Stratum neurofibrarum, optic nerve fiber layer with anchoring par ts of Müller cells

3 Stratum ganglionicum nervi optici (3rd neuron), the ganglion cell layer is single-layered,  the multilayered appearance is an artifact due to the thickness of the section

4 Stratum plexiforme internum, inner plexiform layer (IPL) (only lightly stained). The synapses between bipolar and multipolar ganglia cells of the ganglion cell layer are located here

5 Stratum nucleare internum, inner nuclear layer (INL) (2nd neuron) The blue-violet stained nuclei are part of bipolar ganglia cells (amacrine cells)

6 Stratum plexiform externum, outer plexiforme layer (OPL) (lightly stained). Synapses between receptor cells and bipolar ganglia cells are formed in this layer

7 Stratum neuroepitheliale, rods and cones, outer nuclear layer (1st neuron)

8 Inner and outer segments of rods and cones

9 Stratum pigmentosum retinae, pigment epithelium

10 Lamina choroidocapillaris, choroidal capillary layer; its capillaries attach to the lower basal membrane on the pigmented epithelium

11 The lower third of the figure represents the choroidea with the vascular layer and filled veins as well as pigmented epithelial cells

Stain: alum hematoxylin-eosin; magnification: × 65

References

Kuehnel, W.(2003). Color Atlas of Cytology, Histology, and Microscopic Anatomy. 4^th edition . Institute of Anatomy Universitätzu Luebeck Luebeck, Germany . Thieme Stuttgar t · New York .

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