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  2. Convergence insufficiency - Wikipedia

    en.wikipedia.org/wiki/Convergence_insufficiency

    Symptoms. The symptoms and signs associated with convergence insufficiency are related to prolonged, visually demanding, near-centered tasks. They may include, but are not limited to, diplopia (double vision), asthenopia (eye strain), transient blurred vision, difficulty sustaining near-visual function, abnormal fatigue, headache, and abnormal ...

  3. Scintillating scotoma - Wikipedia

    en.wikipedia.org/wiki/Scintillating_scotoma

    Signs and symptoms. An artist's depiction of a scintillating scotoma with a bilateral arc. Many variations occur, but scintillating scotoma usually begins as a spot of flickering light near or in the center of the visual field, which prevents vision within the scotoma area. It typically affects both eyes, as it is not a problem specific to one eye.

  4. Chronic progressive external ophthalmoplegia - Wikipedia

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

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

  5. Macular degeneration - Wikipedia

    en.wikipedia.org/wiki/Macular_degeneration

    Frequency. 8.7% global prevalence in 2020 [2] Macular degeneration, also known as age-related macular degeneration ( AMD or ARMD ), is a medical condition which may result in blurred or no vision in the center of the visual field. [1] Early on there are often no symptoms. [1]

  6. Cortical blindness - Wikipedia

    en.wikipedia.org/wiki/Cortical_blindness

    Symptoms. The most common symptoms of acquired and transient cortical blindness include: A complete loss of visual sensation and of vision; Preservation/sparing of the abilities to perceive light and/or moving, but not static objects (Riddoch syndrome) A lack of visual fixation and tracking; Denial of visual loss (Anton–Babinski syndrome)

  7. Aberrations of the eye - Wikipedia

    en.wikipedia.org/wiki/Aberrations_of_the_eye

    Aberrations of the eye. The eye, like any other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction and scatter. [1] Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development of methods ...

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