SKERI scientists release Tactile Graphics Helper app for free download
TGH (short for “Tactile Graphics Helper”) is a free iOS app from The Smith-Kettlewell Eye Research Institute that makes tactile graphics available for people with visual impairments. When you point your finger at a feature of interest on a tactile graphic, the app issues text-to-speech information about the feature.
The app is available on the Apple App Store, and instructions on how to use it are here.