I had lasik done in April 2012. during the one month post op visit I discovered that my left eye had been fully corrected while my right eye is not perfect but almost, I have 20/20 vision with both eyes. Lately, (for the past two weeks) I have headaches, my eyes feel heavy, they feel like I am straining and my vision is blurry. It has been more than 6 months and I am worreid. Is this normal? Does the eyesight fluctuate 6 months after surgery? I keep using eye drops but it is not helping.