Welcome to the Migraine and Headaches Forum! This forum is for questions and support regarding migraine and headache issues such as: abdominal
migraines, headaches caused by allergies, cluster headaches,
headaches, headaches in children, migraine headaches, sinus headaches, tension headaches, visual disturbances.
Yes, sinusitis will sometimes cause change in vision that is clarity of vision because they share the same nerve supply. However, the other cause like temporal artery migraine due to spasm should also be considered. I suggest please take an appointment with an ophthalmologist since an eye examination will reveal far more and accurately what the problem could be and for proper treatment.
Take care and keep me posted on your health or if you have any other queries.