Sensory Substitution
Taking our cup of tea example, if a device could be
put at the fill point for the boiling water it may be possible for
the device to emit an audio signal to alert the pourer to stop filling
the cup. So in this case the hearing function has taken the place
of the visual function. Such a device is available through local
low vision resource centres.
Typically in low vision work there are two senses
that may take the place of sight - touch and hearing. Touch may
be used to replace the reading function as in Braille and similar
touch based system. It is also possible to use different textures
for different items to enable touch recognition. Hearing can be
used with talking books and talking watches or clocks.
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