Hi! My 9yr Old Daughter Has Been Doing Involuntary Rolling

Hi! My 9yr old daughter has been doing involuntary rolling of her eyes. I took her to an eye doctor and was assured that her eyes are fine. We were asked to put eye drops to lubricate her eyes as it was caused by dryness. It stopped for a few was but it now has started again. Is this common for young kids and how can this be corrected.