This is really happening and the sheriffs are not thrilled. Some say to refuse them would be against the Americans with Disabilities Act but no state lets blind people drive do they? You have to pass a vision test.
http://www.foxnews.com/us/2013/09/08/iowa-granting-gun-permits-to-blind/
http://www.foxnews.com/us/2013/09/08/iowa-granting-gun-permits-to-blind/