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  2. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    940 million / 13% (2015) [5] Visual or vision impairment ( VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment – visual impairment may cause the individual difficulties with normal daily tasks including reading and walking. [6]

  3. Diabetic retinopathy - Wikipedia

    en.wikipedia.org/wiki/Diabetic_retinopathy

    Diabetic retinopathy. Often asymptomatic, but can cause spots in the eye and vision loss. Diabetic retinopathy (also known as diabetic eye disease ), is a medical condition in which damage occurs to the retina due to diabetes. It is a leading cause of blindness in developed countries. Diabetic retinopathy affects up to 80 percent of those who ...

  4. Macular degeneration - Wikipedia

    en.wikipedia.org/wiki/Macular_degeneration

    Signs and symptoms Normal vision The same view with age-related macular degeneration. Early or intermediate AMD may be asymptomatic, or it may present with blurred or decreased vision in one or both eyes. This may manifest initially as difficulty with reading or driving (especially in poorly lit areas).

  5. Chronic progressive external ophthalmoplegia - Wikipedia

    en.wikipedia.org/wiki/Chronic_progressive...

    Ophthalmology. Chronic progressive external ophthalmoplegia ( CPEO) is a type of eye disorder characterized by slowly progressive inability to move the eyes and eyebrows. [1] It is often the only feature of mitochondrial disease, in which case the term CPEO may be given as the diagnosis. In other people suffering from mitochondrial disease ...

  6. Keratoconus - Wikipedia

    en.wikipedia.org/wiki/Keratoconus

    Some individuals have vision in one eye that is markedly worse than the other eye. The disease is often bilateral, though asymmetrical. Some develop photophobia (sensitivity to bright light), eye strain from squinting in order to read, or itching in the eye, but there is normally little or no sensation of pain. It may cause luminous objects to ...

  7. Retinopathy - Wikipedia

    en.wikipedia.org/wiki/Retinopathy

    Retinopathy, or retinal vascular disease, can be broadly categorized into proliferative and non-proliferative types. Frequently, retinopathy is an ocular manifestation of systemic disease as seen in diabetes or hypertension. [3] Diabetes is the most common cause of retinopathy in the U.S. as of 2008. [4]

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