wearable fitness gear

New devices are democratizing health. We see it not only in the array or wearable fitnessgear that an estimated 21 percent of Americans own (and that some actually wear), but also in innovative uses for mobile phones (such as testing vision in regions that lack doctors or checking athletes for concussions) and now in low-cost devices that are often open source hardware and software. Recent examples of the latter include the eyeSelfie, which lets a non-professional take an image of his retina, and the WearDuino, a general-purpose personal device that is the focus of this article.

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