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  2. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    Although astigmatism may be asymptomatic, higher degrees of astigmatism may cause symptoms such as blurred vision, double vision, squinting, eye strain, fatigue, or headaches. [7] Some research has pointed to the link between astigmatism and higher prevalence of migraine headaches.

  3. Astigmatism (optical systems) - Wikipedia

    en.wikipedia.org/wiki/Astigmatism_(optical_systems)

    Astigmatism is quite common. Studies have shown that about one in three people suffers from it. [6] [7] [8] The prevalence of astigmatism increases with age. [9] Although a person may not notice mild astigmatism, higher amounts of astigmatism may cause blurry vision, squinting, asthenopia, fatigue, or headaches. [10] [11] [12]

  4. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    Other symptoms may include double vision, headaches, and eye strain. [3] Near-sightedness is due to the length of the eyeball being too long, far-sightedness the eyeball too short, astigmatism, the cornea being the wrong shape, and presbyopia aging of the lens of the eye such that it cannot change shape sufficiently. [3]

  5. Why astigmatism causes blurry vision, especially at night - AOL

    www.aol.com/news/why-astigmatism-causes-blurry...

    Astigmatism, a disorder that affects how the eyes focus light, can be exacerbated at night. Blurry vision and headaches are symptoms of astigmatism. Why astigmatism causes blurry vision ...

  6. Scintillating scotoma - Wikipedia

    en.wikipedia.org/wiki/Scintillating_scotoma

    Symptoms typically appear gradually over 5 to 20 minutes and generally last less than 60 minutes, leading to the headache in classic migraine with aura, or resolving without consequence in acephalgic migraine. [3] For many sufferers, scintillating scotoma is first experienced as a prodrome to migraine, then without migraine later in life ...

  7. Aniseikonia - Wikipedia

    en.wikipedia.org/wiki/Aniseikonia

    If magnification difference becomes excessive the effect can cause diplopia, suppression, disorientation, eyestrain, headache, and dizziness and balance disorders. [3] Asthenopic symptoms alone may occur even if image size difference is less than 7%. [4]

  8. Eye strain - Wikipedia

    en.wikipedia.org/wiki/Eye_strain

    Eye strain, also known as asthenopia (from astheno- 'loss of strength' and -opia 'relating to the eyes'), is a common eye condition that manifests through non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and occasional double vision. [1]

  9. Cluster headache - Wikipedia

    en.wikipedia.org/wiki/Cluster_headache

    Cluster headache is a neurological disorder characterized by recurrent severe headaches on one side of the head, typically around the eye(s). [1] There is often accompanying eye watering, nasal congestion, or swelling around the eye on the affected side. [1] These symptoms typically last 15 minutes to 3 hours. [2]

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