My 7 month old son had hand, foot and mouth last week and I believe that I have it now. Is there anything I can do for the symptoms? Is blurred vision normal?

Typically blurred vision is not one of the symptoms. However, if you have a headache (headache is a syptome), blurred vision may occur.

There is nothing you can to other than treat symptoms. Headache treat with tylenol, itch treat with antihistamines. This is a virus and it just has to run its course.