After getting a sinus infection, my vision gets blurry in one eye (mostly peripheral) after being in sunlight or fluorescent lighting for a long time ?

Many possibilities: I would have to know how long this episode lasts and whether there are any formed images along with the blurriness--such as zig-zag lines or scintillating lights, etc. Most such visual symptoms that are episodic and often associated with light exposure can fall into migraine aura category. Need to know more details to be more certain.

Ans: Well first you must clear the sinus infection. Make sure you steam and have the steam clean the sinus Cohen of the problem continues with the eye you better see the opthomoligist