Doxepin belongs to a class of drugs called tricyclic antidepressants. I was on this type of med however a different one for years and also found at first my head felt foggy but never had any vision problems.
If you are having problems with your eyes and head fullness I would contact your physician to discuss these sx soon as this may not be the right medication for you.
Never be afraid to advocate for yourself. Good to see you here and hope to see more of you.