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The software is intended to help individuals with "early vision loss, computer vision syndrome, and visual impairments such as macular degeneration and glaucoma". [5] ZoomText has dual monitor support and is capable of magnifying the screen up to 60 times; it also allows the user to choose which part of the screen is magnified.
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.
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]
Thus, while a "full page magnifier" based on a fresnel lens can span some 625 cm 2 (96.9 sq in) , it typically achieves no more than 1.4x magnification (advertised as "2x" if measured by area instead of the scale factor); an aspheric segment hand magnifier can achieve a scale factor in excess of two (area factor in excess of four) but typically ...
The incidence of age-related macular degeneration and its associated features increases with age and is low in people <55 years of age. [101] Smoking is the strongest modifiable risk factor. [102] As of 2008, age-related macular degeneration accounts for more than 54% of all vision loss in the white population in the US. [103]
A dome magnifier is a dome-shaped magnifying device made of glass or acrylic plastic, used to enlarge words on a page or computer screen. They are plano-convex lenses: the flat (planar) surface is placed on the object to be magnified, and the convex (dome) surface provides the enlargement. They usually provide between 1.8× and 6× ...