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The Optical Knowledge Portal
Information – Education – Certification

Special visual aids

Special visual aids

The primary purpose of dispensing special visual aids is to help visually impaired people, especially older people with sight problems, retain or regain their reading ability. The aid must be selected with regard to the patients’ special needs (age, profession, hobbies and mobility) and the magnification power required. In addition to offering the necessary visual acuity, the visual aid must provide the largest field of view possible. As magnification increases, the field of view decreases. Consequently, patients may experience problems when using magnifying systems that are too powerful. This is why it is recommended that the minimum possible magnification always be selected.
Being able to read and watch TV are some of the most frequently expressed requests of visually impaired people. This challenge can be solved with a variety of special visual aids.