Here is a braille display that enables low-vision / blind users get a tactile feeling for images on their iPhone or iPad. The Dot Pad works with VoiceOver. It renders images and text from iOS devices instantly. It also comes with an API that developers can use to come up with custom apps.
More gadgets like this: here
The Dot Pad is currently available to early adopters. You can find out more about it here.
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