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  2. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    Eye injuries, most often occurring in people under 30, are the leading cause of monocular blindness (vision loss in one eye) throughout the United States. Injuries and cataracts affect the eye itself, while abnormalities such as optic nerve hypoplasia affect the nerve bundle that sends signals from the eye to the back of the brain, which can ...

  3. Monocular vision - Wikipedia

    en.wikipedia.org/wiki/Monocular_vision

    Monocular vision impairment refers to having no vision in one eye with adequate vision in the other. [2] Monopsia is a medical condition in humans who cannot perceive depth even though their two eyes are medically normal, healthy, and spaced apart in a normal way. Vision that perceives three-dimensional depth requires more than parallax. In ...

  4. Monochromacy - Wikipedia

    en.wikipedia.org/wiki/Monochromacy

    A cone monochromat can have good pattern vision at normal daylight levels, but will not be able to distinguish hues. As humans typically exhibit three classes of cones, cone monochromats can hypothetically derive their photopic vision from any one of them, leading to three categories of cone monochromats: [4]

  5. Optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Optic_neuropathy

    The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye. A pale disc is characteristic of long-standing optic neuropathy. In many cases, only one eye is affected and a person may not be aware of the loss of color vision until the examiner asks them to cover the healthy eye.

  6. Amblyopia - Wikipedia

    en.wikipedia.org/wiki/Amblyopia

    Amblyopia, also called lazy eye, is a disorder of sight in which the brain fails to fully process input from one eye and over time favors the other eye. [1] It results in decreased vision in an eye that typically appears normal in other aspects. [1]

  7. Cataract - Wikipedia

    en.wikipedia.org/wiki/Cataract

    A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. [ 1 ] [ 7 ] Cataracts often develop slowly and can affect one or both eyes. [ 1 ] Symptoms may include faded colours, blurry or double vision , halos around light, trouble with bright lights, and difficulty seeing at night . [ 1 ]

  8. List of systemic diseases with ocular manifestations - Wikipedia

    en.wikipedia.org/wiki/List_of_systemic_diseases...

    Granulomatosis with polyangiitis 50-60% have ophthalmologic manifestations, which can be a presenting feature in a minority of patients. Orbital disease is the most common manifestation, and may result in proptosis , restrictive ophthalmopathy , chronic orbital pain, and in chronic cases, orbital retraction syndrome and intractable socket pain.

  9. Stereoblindness - Wikipedia

    en.wikipedia.org/wiki/Stereoblindness

    Stereoblindness (also stereo blindness) is the inability to see in 3D using stereopsis, or stereo vision, resulting in an inability to perceive stereoscopic depth by combining and comparing images from the two eyes. Individuals with only one functioning eye have this condition by definition since the visual input of the second eye does not exist.