Brain mri "there is mild polypoid mucosal thickening in ethmoid air cells."i have headaches, vision/hearing changes, tearing up, head pressure, sinuitis?

Possible: Mri is not a sensitive tool for sinusitis. Often, the sinuses are normal when one lights up on an mri. Your symptoms are not classic for a sinus infection, and MRI is better for looking for central nervous system problems as the cause of your headache. I would ask your doctor for an antibiotic good for sinusitis and follow up with a ct scan of the sinuses for the definitive answer.