Read the post titled "lightheaded and ears ringing".
My symptoms seem a little similar to yours, but I haven't had the vision problem or any hearing loss. I do have occasional lightheadedness (not room spinning, just sort of wooziness) with pressure around my ears and some ear pain and headache around my ears.
I've been using Chlor Trimeton (based on another poster's advice) and it has seemed to help some. I've also found that sudafed helps a little.
Anyway, good luck.
Is your pressure/problems on both sides of your head? Have you seen an ENT?