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Having to depend on others to access the most basic information is a much more debilitating limitation than any physical disability . According to iCan.com , 81 percent of voters with visual disabilities must rely on others to mark their ballots , while only about 10 percent of polling places are wheelchair accessible . Although a well trained , guide dog and other assistance animals can become confused or disoriented in a disaster , people who are blind or partially sighted may have to depend on others to lead them , as well as their dog , to safety during a disaster .