Head Neck Eye Pain All on Right side.

Fora a few months now, I am feeling mild headache and slight eye pain only on right side. Sometimes the pain is severe and start feeling pain at back of my head as well as neck. Everything is just for one right side. This continues for a day or two. I had a last MRI done a 1.5 back, and there was no issues. Everything was normal. I take naxdom 500 and the pain at back of head goes, however pain at right side head, eye and neck continues. It is not severe, just stays for everyday. If I get engaged in work or just stop ignoring the pain, it isn't feeled, but I cannot ignore it for long time. The pain just feels and affects my focus in every work. I have spectacle and my work is mostly on sitting in front of computers atleast for 10hours. Pls. Help on how to reduce that daily mild pain. Is that specs issue or just my mind recreating pain. Thanks