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Screen magnifiers commonly provide several other features for people with particular sight difficulties: Color inversion. Many people with visual impairments prefer to invert the colors, typically turning text from black-on-white to white-on-black. This can reduce screen glare and is useful for elderly people with age-related macular degeneration.
Metamorphopsia is a symptom of several common retinal and macular diseases, therefore treating the underlying disorder can improve symptoms. For people who have conditions such as epiretinal membrane (ERM), macular holes and retinal detachment , decreased metamorphopsia is associated with an increase in visual acuity . [ 4 ]
MonoMouse is a handheld electronic magnifier manufactured by Bierley, designed to help people with a visual impairment to read printed text or images. [1] [2]Originally developed by Ian Bierley in 2003 for use by his mother, who had glaucoma, and then later released as a commercial product supplied through opticians in 2005. [3]
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]
Presbyopia can be corrected using glasses, contact lenses, multifocal intraocular lenses, or LASIK (PresbyLASIK) surgery. [2] [7] [4] The most common treatment is glass correction using appropriate convex lens. Glasses prescribed to correct presbyopia may be simple reading glasses, bifocals, trifocals, or progressive lenses. [4]
They are available in common reading prescriptions with strengths ranging from +0.75 to +3.50 diopters. While these "magnifiers" do indeed make the image of the viewed object bigger, their main advantage comes from focusing the image, not magnification. These glasses are not tailored to a person's individual needs.
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