SCREEN READERS FOR VISUALLY IMPAIRED FULL
The mouse and text cursors can often be modified in several ways, such as circling it to help the user locate it on the screen.ĭifferent Magnification Modes Screen magnifiers can alter how they present the enlarged portion: covering the full screen, providing a lens that is moved around the un-magnified screen, or using a fixed magnified portion. Some screen magnifiers use interpolation to smooth the text to compensate.Ĭursor customisation. Smoothing Text can become blocky and harder to recognise when enlarged.
This can reduce screen glare and is useful for elderly people suffering from age-related macular degeneration.
Screen magnifiers commonly provide several other features for people with particular sight difficulties:Ĭolor Inversion.Many people with visual impairments prefer to invert the colors, typically turning text from black-on-white to white-on-black. The greater the magnification the smaller the proportion of the original screen content that can be viewed, so users will tend to use the lowest magnification they can manage. Ranges of 1- to 16-times magnification are common. Pop-up windows and changes in system status can also trigger this rapid shifting. Also, the pointer or cursor may not be the content of interest: for example, if the user presses a keyboard shortcuts that opens a menu, the magnified portion should jump to that menu. If this tracking is jerky or flickers it is likely to disturb the user. As the user moves the pointer or cursor the screen magnifier should track with it and show the new enlarged portion. This enlarged portion should include the content of interest to the user and the pointer or cursor, also suitably enlarged. The simplest form of magnification presents an enlarged portion of the original screen content, the focus, so that it covers some or all of the full screen. It is a type of assistive technology suitable for visually impaired people with some functional vision visually impaired people with little or no functional vision usually use a screen reader.
SCREEN READERS FOR VISUALLY IMPAIRED SOFTWARE
A screen magnifier is software that interfaces with a computer’s graphical output to present enlarged screen content.