Itchy eyes, flashes of digital screens.

I have itchy eye which occurs more than twice a day. Whenever I watch or work with digital screens, I see flashes of the screen when I blink my RIGHT eye. Sometimes eye strain like experience happens where back of my RIGHT side head aches when i try to focus on something. I have a long history of sinus problem, I frequently experience migrane pains on top my head ( Mostly left side ). I experience seasonal allergies too, during that I suffer from stuffy, runny nose. Which resolves in a day or two. Mentioning this if snius and migrane problems have anything to do with my current conditions. I've tried some home remedies like ice pack and potato slices but nothing works. When i sleep it gets better for sometime.