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prime importance when it comes to smartphones for visually impaired people: Rather than the phone's design and finish, the integrated aids to operation and available apps are to the fore. Surfing the Internet [...] function is to invoke and used depends on the various touch gestures of the operating systems. The specific gesture (double tapping with three fingers) to invoke the zoom with iOS leads to confusion less [...] make it easier to work with the smartphone or cope with everyday tasks and events. Whilst the smartphone cannot replace low vision aids, its well-functioning speech input and -output proves to be extremely