Thank you for your query.
Do not panic.There can be 2 reasons for this.
1. Tension headaches
..relieved by paracetamol/acetaminophen
,taking a break.
2. Refractory errors of the eye...need to see an ophthalmologist.
...need to see a neurologist
...unlikely cause in your child
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing your child a speedy recovery.
Have a nice day.