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  2. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    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. Vision rehabilitation - Wikipedia

    en.wikipedia.org/wiki/Vision_rehabilitation

    Vision rehabilitation (often called vision rehab) is a term for a medical rehabilitation to improve vision or low vision.In other words, it is the process of restoring functional ability and improving quality of life and independence in an individual who has lost visual function through illness or injury.

  4. Low vision assessment - Wikipedia

    en.wikipedia.org/wiki/Low_vision_assessment

    Low vision is both a subspeciality and a condition. Optometrists, Opticians and Ophthalmologists after their training may undergo further training in Low vision assessment and management. There are various classifications for low vision, this varies from country to country and even from state to state.

  5. Sensory loss - Wikipedia

    en.wikipedia.org/wiki/Sensory_loss

    Degrees of vision loss vary dramatically, although the ICD-9 released in 1979 categorized them into three tiers: normal vision, low vision, and blindness.Two significant causes of vision loss due to sensory failures include media opacity and optic nerve diseases, although hypoxia and retinal disease can also lead to blindness.

  6. Deafblindness - Wikipedia

    en.wikipedia.org/wiki/Deafblindness

    It was designed as a TTY for deaf-blind people and is also useful for face-to-face conversation. It has two components: The sighted component is a modified SuperCom TTY device. It has a qwerty keyboard and a single-line LED display. The display is regular size and is not particularly suited to people with low vision.

  7. LogMAR chart - Wikipedia

    en.wikipedia.org/wiki/LogMAR_chart

    The World Health Organization established criteria for low vision using the LogMAR scale. Low vision is defined as a best-corrected visual acuity worse than 0.5 LogMAR but equal or better than 1.3 LogMAR in the better eye. [7] Blindness is defined as a best-corrected visual acuity worse than 1.3 LogMAR. [7]

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