I regularly have problems with my sinuses (and ENT in general). Over the last few months I have noticed an occasional "visual disturbance" followed by sinus pain. I have seen the optician and the specialist eye clinic and they see nothing wrong. When I suggested it might be related to my sinuses they pooh-poohed me but I have spoken to people who have migraines about the "halo effect" and I wonder if its something similar. Just wondering if anyone out there has experienced similar.