In disorders of the eye such as macular degeneration, retinal changes, optic atrophy, color blindness, and nystagmus, rehabilitation is made in the first instance by adjusting appropriate visual aids (glasses, contact lenses, filter glasses). Monocular, hand held magnifiers or magnifying glasses are some other devices that are used for the
A visual aid is an optical or optoelectronic device to optimize vision or rehabilitation of visual impairment. These include, among others, glasses and contact lenses, or magnifying glasses.
As a result of the increasing importance of computer applications visual aids are needed in the computer field. The only computer-based applications in this area are screen magnifiers and electronic reading aids (screen reader).