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First, smear a film of Vaseline over your glasses. Then slip on a pair of thin rubber gloves and tuck some cotton into your ears. Finally, and this requires some imagination, pretend you've shrunk a few inches and that you can't reach as high or as far. This is what life may be like for some of us by the time we reach our 70s. Like it or not, as we age we lose many of our capabilities. The little things in life, like making a meal, taking a bath, and just generally getting around the house, become more difficult. When age brings real disability as well, being bound to a wheelchair or walker can