had lasik wavefront on 21st september, 10 days later developed a persistent headache which i have all the time. I have had mri, ct scans etc and all have came up clear. My eye surgeon tells me that the headaches are not coming from the surgery as this would be highly unusual, and i have had my normal eye doc take a look and apart from dryness also cannot see anything that could cause headaches. Could the dry eye be causing this persistent headache as i'm running out of options as to what to do next.