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  2. Macular degeneration - Wikipedia

    en.wikipedia.org/wiki/Macular_degeneration

    Macular degeneration, also known as age-related macular degeneration (AMD), is a condition that affects the central vision and may lead to blurred or no vision in the center of the visual field. Learn about the risk factors, types, diagnosis, prevention, and treatment options for AMD from this comprehensive Wikipedia article.

  3. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    A radar beacon (racon) is a device that returns a distinctive signal when triggered by a radar, providing range, bearing and identification information. Learn about the principle of operation, the characteristics, the applications and the proposal for enhanced RACON.

  4. Stargardt disease - Wikipedia

    en.wikipedia.org/wiki/Stargardt_disease

    Stargardt disease is a genetic retinal disorder that causes vision loss in childhood or adolescence. Learn about its symptoms, genetics, pathophysiology, diagnosis and treatment options from this comprehensive article.

  5. Retinal pigment epithelium - Wikipedia

    en.wikipedia.org/wiki/Retinal_pigment_epithelium

    The retinal pigment epithelium (RPE) is the pigmented cell layer just outside the neurosensory retina that nourishes retinal visual cells. It is part of the outer blood–retinal barrier and has several functions, such as light absorption, epithelial transport, visual cycle, phagocytosis, secretion and immune modulation.

  6. Retinopathy - Wikipedia

    en.wikipedia.org/wiki/Retinopathy

    Retinopathy is any damage to the retina of the eyes that may cause vision impairment. It can be caused by diabetes, hypertension, radiation, sickle cell disease, and other factors. Learn about the proliferative and non-proliferative types, signs and symptoms, pathophysiology, diagnosis, and treatment of retinopathy.

  7. Diabetic retinopathy - Wikipedia

    en.wikipedia.org/wiki/Diabetic_retinopathy

    Diabetic retinopathy is a condition that damages the retina due to diabetes, and can cause vision loss or blindness. Learn about the signs and symptoms, such as spots, bleeding, swelling, and new blood vessels in the eye, and the factors that increase the risk of developing diabetic retinopathy.

  8. Retinitis pigmentosa - Wikipedia

    en.wikipedia.org/wiki/Retinitis_pigmentosa

    Retinitis pigmentosa (RP) is a genetic disorder of the eyes that causes loss of vision. It is characterized by progressive degeneration of rod and cone photoreceptor cells, resulting in night blindness, tunnel vision, and pigment deposits in the retina.

  9. Retinal ganglion cell - Wikipedia

    en.wikipedia.org/wiki/Retinal_ganglion_cell

    A retinal ganglion cell is a type of neuron that transmits visual information from the retina to the brain. Learn about its function, types, physiology, pathology, and developmental biology.

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