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Aug 10, 2023 · 10 August 2023. Key facts. Globally, at least 2.2 billion people have a near or distance vision impairment. In at least 1 billion of these, vision impairment could have been prevented or is yet to be addressed. The leading causes of vision impairment and blindness at a global level are refractive errors and cataracts.
Blindness is the inability to see or a lack of vision. In the most severe cases, there’s an inability to see even light. It also means that you can’t correct your vision with eyeglasses, contact lenses, eye drops or other medical therapy, or surgery. Sudden vision loss is an emergency. It’s important to seek immediate medical help.
Sep 25, 2023 · Takeaway. Blindness is usually due to age-related conditions such as macular degeneration, glaucoma, or cataracts. But other rare conditions can also cause blindness in people of all ages. More...
There are several ways to define blindness. Many people regard blindness as inability to see at all or, at best, to discern light from darkness. The National Federation of the Blind takes a much broader view.
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] .
Jan 24, 2023 · Summary. Complete blindness means a lack of vision and no perception of light. There are other forms of blindness, including legal blindness, night blindness, and color blindness. The most common causes of blindness in the United States are AMD, cataracts, and diabetic retinopathy.
Home. Blindness and Low Vision. Technology Resources for People with Vision Loss. When you think of technology from the perspective of people who are blind or have low vision, you can think of two broad categories: General technology: such as computers, smartphones and cell phones, GPS devices, etc.
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