<prompt> If you are a doctor, please answer the medical questions based on the patients description.I was diagnosed with a sinus infection 2.5 weeks ago and after going through treatment with 2 different antibiotics, I still am having the pressure and pain. My immediate concern is that 2 days ago, I began experiencing double vision it is worse when looking at images farther away. I have an appointment with my ophthalmologist in 2 days and an ear, nose, throat specialist in a week. Should I seek immediate attention or is the double vision a result of the infection?  <response>: Hello! In general sinus infection does not cause double vision. There are a number of potential causes for double vision. This happens when you have eyes problems for example the eyes are not be properly aligned ostracism or if you have a condition where the eyes do not work together correctly convergence insufficiency, cataract,astigmatism, macular degeneration etc.. Myastenia graves if you have weakness in the bodies muscles You have to check for dialect, thyroid disease, and I recommend doing a brain CT examination immediately. 