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I have massive issues with the fingerprint systems like Apple Touch ID because of my eczema. Sometimes I have to retrain as often as once a week. I'm not alone with this problem, how exactly will these systems approach people with very real challenges with fingerprints, missing eyes and other issues?

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I'm not offering this as a solution, but Touch ID reads subdermal features and therefore works on literally any exposed area of skin, not just your finger tips. People have tested with MANY parts of the body. (Seriously.) Perhaps you could use some other part of you to train the sensor?

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