Inner retinal layers12/11/2023 The ciliary and iridial parts of the retina are forward prolongations of the pigmented layer and a layer of supporting columnar or epithelial cells over the ciliary body and the posterior surface of the iris, respectively. About 3 mm medial to the fovea is the optic disc, where axons of the ganglionic cells converge to form the optic nerve. Here layers 6-9 and blood vessels are absent, and only elongated cones are present. At the posterior pole of the visual axis is the macula, in the center of which is the fovea, the area of acute vision. ![]() The optic part, the physiologic portion that receives the visual light rays, is further divided into two parts, pigmented part (pigment epithelium) and nervous part, which are arranged in the following layers: 1) pigment epithelium 2) layer of rods and cones 3) external limiting lamina, actually a row of junctional complexes 4) external nuclear lamina 5) external plexiform lamina 6) internal nuclear lamina 7) internal plexiform lamina 8) ganglionic cell lamina 9) lamina of nerve fibers 10) internal limiting lamina. Grossly, the retina consists of three parts: optic part of retina, ciliary part of retina, and iridial part of retina. The light-sensitive membrane forming the innermost layer of the eyeball. Here, layers 6-9 and blood vessels are absent, and only elongated cones are present. The optic part, the physiologic portion that receives the visual light rays, is further divided into two parts, the pigmented part (pigment epithelium) and the nervous part, which are arranged in the following ten layers: pigmented layer layer of inner and outer segments (of rods and cones) outer limiting layer (actually a row of junctional complexes) outer nuclear layer outer plexiform layer inner nuclear layer inner plexiform layer ganglionic (cell) layer layer of nerve fibers and inner limiting layer. Grossly, the retina consists of three parts: optic, ciliary, and iridial.
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