How uncanny to find this thread right now, just a day after I had a bizarre case of sinus pain influencing my eyesight and dexterity somehow. Definitely something I should look into ASAP.
My terminology was poor. The venous sinuses aren’t associated with your sinus. They are sort of like the storm drain for your brain, in a sense, not the same as the nasal sinus.
Thank you Baader–Meinhof I suppose.