Hearing loss can amplify cognitive decline by isolating retirees and forcing them to divert precious brain power to participate in a conversation. People who lose teeth have trouble eating, sacrificing their health. And poor vision, uncorrected by cataract surgery or the proper magnification in eyeglasses, is dangerous when driving at night. These problems are facts of aging. But Medicare doesn’t cover their often-expensive solutions such as hearing aids, dental implants, or eyeglasses. A report by the Kaiser Family Foundation identified a gap between need and access is wide. Among the 16 percent of Americans over 65 who said in a survey that they couldn’t get hearing, dental or vision services, nearly three out of four couldn’t afford them. Three charts, based…