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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]
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.
Low vision visual acuity examinations are done using the LogMAR chart. The advantage that this presents with is that it allows for more accurate measures of the individual's vision to be recorded. Other tests done and their significance are as follows: Amsler's grid test - to locate scotomas on the visual field of the individual
A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 metres or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. [9] Vision of 6/12 corresponds to lower performance, while vision of 6/3 to better ...
A Connecticut boy is among four children all born with severe childhood blindness who gained “life-changing improvements” to their vision after an experimental trial of gene therapy. Jace was ...
Night vision is the ability to see in low-light conditions, ... Lately, night vision technology has become more widely available for civilian use.
Lighthouse Guild is an American charitable organization, based in New York City, devoted to vision rehabilitation and advocacy for the blind. Its mission statement is "To overcome vision impairment for people of all ages through worldwide leadership in rehabilitation services, education, research, prevention and advocacy."
"Electronic glasses" can also refer to electronically enhanced eyeglasses, sometimes called e-glasses, designed for users who are not necessarily visually impaired. These wearable devices use electronic technology to dynamically improve focus, adjust for available light, monitor and record health data, receive and display information, and/or facilitate control in gaming environments.
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