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 outer layers, including rods and cones, are nourished by capillaries of the choroid layer. *The figures given for the size of the disc are those corresponding to the blind spot. The retina is a light-sensitive membrane on which light rays are focused. A retina having a spotted or striped appearance, seen in retinitis pigmentosa. MedlinePlus also links to health information from non-government Web sites. MedicineNet does not provide medical advice, diagnosis or treatment. Accessed Feb. 11, 2020. https://medical-dictionary.thefreedictionary.com/Retinal+diseases. Retinal diseases can affect any part of your retina, a thin layer of tissue on the inside back wall of your eye. A delicate, multilayered, light-sensitive membrane lining the inner eyeball and connected by the optic nerve to the brain. Layers 2-10 comprise the nervous part. Retinal diseases vary widely, but most of them cause visual symptoms. It provides the sharp, central vision needed for reading, driving and seeing fine detail. Any use of this site constitutes your agreement to the Terms and Conditions and Privacy Policy linked below. American Society of Retina Specialists. 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 retina contains millions of light-sensitive cells (rods and cones) and other nerve cells that receive and organize visual information. The veins lack muscular coats. Retinal disorders affect this vital tissue. The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. 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. In the center of this nerve tissue is the macula. It's important to pay attention to any changes in your vision and find care quickly. Slightly lateral to the posterior pole of the eye is a small, oval, yellowish spot, the macula lutea, in the center of which is a depression, the fovea centralis. 5th ed. These are warning signs of potentially serious retinal disease. Age-related macular degeneration preferred practice pattern — 2019. These may include: You may need to try looking with each eye alone to notice these. Allscripts EPSi. Retinal diseases vary widely, but most of them cause visual symptoms. Structure of the retina showing the rods and cones. Blurred or distorted (straight lines look wavy) vision. Accessed Feb. 10, 2020. This region contains only cones and is the region of the most acute vision. Your retina sends this information to your brain through your optic nerve, enabling you to see.Treatment is available for some … 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. See our, URL of this page: https://medlineplus.gov/retinaldisorders.html, (American Association for Pediatric Ophthalmology and Strabismus), (Mayo Foundation for Medical Education and Research), References and abstracts from MEDLINE/PubMed (National Library of Medicine). 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. Ophthalmology. 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Mayo Clinic College of Medicine and Science, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic School of Continuous Professional Development, Mayo Clinic School of Graduate Medical Education, FREE book offer – Mayo Clinic Health Letter. Evaluation of the ophthalmologic patient. They parallel the arteries; blood leaves by a central vein that leads to the superior ophthalmic vein. 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