See how you feel after the sinus surgery - when you are super dizzy, it can throw off a lot. I had sinus surgery and it was great once I healed.
Usually MRIs don't miss anything (unless we are talking pituitary, but that is not the case here) - the sinus symptoms appear to cover what is up, and see if that makes you feel better.
Also, wanted you to know I don't claim to be God! I belong to Him though! :0)
Have you been to an opthamologist to get your eyes checked, since your vision is clouded? Have you had any other tests besides the MRI you refer to?