DD friend had this problem changed optician and problem where found. She now has glasses which have made a huge different for her.
I ask, as dd gets what I think is eye stain headaches, (use to get them myself) occasionally with tired eyes. Been every year to have her eye checked since she started school (Yr4 now). The headaches started just over a year ago have been to the optician since. Very slightly long sighted but normal for her age.
Headaches are coming more frequent and sore tired eyes seem to have started but not so often as headaches. Is it worth trying getting a second opinion as is it that normal for problems to go undetected.