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Assistive Technology for Blindness and Low Vision by Roberto Manduchi, Sri Kurniawan

By Roberto Manduchi, Sri Kurniawan

''This publication presents a complete evaluate of the present cutting-edge in assistive know-how for individuals with visible impairment, in addition to wide assurance into promising new study instructions. starting with a quick evaluate of the psychopathology of low imaginative and prescient and blindness, the textual content proceeds with in-depth descriptions of present expertise to help self sustaining mobility and orientation, information Read more...

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Extra info for Assistive Technology for Blindness and Low Vision

Sample text

Chapter 8 offers an extended discussion of the potential as well as the challenges and pitfalls of trying to substitute one sensory system for another. We mentioned earlier that the ergonomic design of devices (placement of knobs and controls) is at least as important for general acceptance as are their technical capabilities. An intuitive design lessens the amount of attention needed to manipulate the device, thus increasing the amount of attention available for the task. High power magnifiers are usually stand magnifiers, to avoid the use of attention to keep the lens focused.

As children who are blind or visually impaired grow and develop they experience new impressions of their immediate environments. If they are allowed to explore, bump, and bruise themselves—like any other child— they can develop the necessary skill-sets and spatial understanding to navigate purposefully through a familiar or novel environment. For those who are adventitiously blind or visually impaired, that is, who become blind or visually impaired later on after birth through some disease, trauma or accident, Orientation and Mobility instruction can play a pivotal role in whetheror-not they will lead independent lives.

The retinal image triggers and updates the mental model, but there are many important differences. The retinal image is constantly shifting; the mental model is stable. The retinal image is eye-centered; the mental model is anchored in the environment. When we walk around, we do not perceive the image of the environment moving across our retina, like the image in a moving video camera. Instead, we experience ourselves moving through a stable environment. The retinal image is made up of 2-dimensional images; the mental model is filled with 3-dimensional objects.

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