A University of Michigan study found that people with better vision (including those who were corrective eye glasses or contacts) were 63% less likely to develop Alzheimer’s disease over an 81/2 year period than those with poor eyesight who did not correct it.  It is thought that some vision problems and dementia may share the same underlying causes.  In addition, people who do not see well tend to avoid brain – boosting habits such as exercise, reading, socializing, word games, etc…