Template:Vision terms: Difference between revisions
From Embryology
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* '''nasolacrimal groove''' - (lacrimal groove) an embryonic surface feature between the maxillary and the lateral nasal process that will later fuse to form the lacrimal duct running between the eye and the nasal inferior meatus. | * '''nasolacrimal groove''' - (lacrimal groove) an embryonic surface feature between the maxillary and the lateral nasal process that will later fuse to form the lacrimal duct running between the eye and the nasal inferior meatus. | ||
* '''optic cup''' - the in-folded extension of the optic stalk from the diencephalon that forms the retina. | * '''optic cup''' - the in-folded extension of the optic stalk from the diencephalon that forms the retina. | ||
* '''optic placode''' - (lens placode) surface ectoderm that folds inward to form the developing lens. | |||
* '''retina''' - The stratified sensory structure of the eye, formed from the neural ectoderm that extends from the forebrain (diencephalon) to form initially the folded optic cup. Vertebrates have ten identifiable layers formed from nerve fibers, neurons, membranes, photoreceptors and pigmented cells. Light must pass through nearly all these layers to the photoreceptors. (1. Inner limiting membrane - Müller cell footplates; 2. Nerve fiber layer; 3. Ganglion cell layer - layer of retinal ganglion cells their axons form the nerve fiber layer and eventually the optic nerve; 4. Inner plexiform layer - another layer of neuronal processes; 5. Inner nuclear layer; 6. Outer plexiform layer; 7. Outer nuclear layer; 8. External limiting membrane - layer separating inner segment portions of photoreceptors from their cell nuclei; 9. Photoreceptor layer - rods and cones that convert light into signals; 10. Retinal pigment epithelium). | * '''retina''' - The stratified sensory structure of the eye, formed from the neural ectoderm that extends from the forebrain (diencephalon) to form initially the folded optic cup. Vertebrates have ten identifiable layers formed from nerve fibers, neurons, membranes, photoreceptors and pigmented cells. Light must pass through nearly all these layers to the photoreceptors. (1. Inner limiting membrane - Müller cell footplates; 2. Nerve fiber layer; 3. Ganglion cell layer - layer of retinal ganglion cells their axons form the nerve fiber layer and eventually the optic nerve; 4. Inner plexiform layer - another layer of neuronal processes; 5. Inner nuclear layer; 6. Outer plexiform layer; 7. Outer nuclear layer; 8. External limiting membrane - layer separating inner segment portions of photoreceptors from their cell nuclei; 9. Photoreceptor layer - rods and cones that convert light into signals; 10. Retinal pigment epithelium). | ||
* '''retinal pigment epithelium''' - (RPE) An epethial pigmented cell layer lying outside the sensory retina, formed from the outer layer of the folded optic cup. The RPE is firmly attached to the underlying choroid and overlying retinal visual cells, for which it has a nutritional role. | * '''retinal pigment epithelium''' - (RPE) An epethial pigmented cell layer lying outside the sensory retina, formed from the outer layer of the folded optic cup. The RPE is firmly attached to the underlying choroid and overlying retinal visual cells, for which it has a nutritional role. |
Revision as of 16:04, 17 October 2016
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