My dd 3yrs 9montgs developed a squint just after her 3rd birthday. Glasses were prescribed fairly promptly and her squint resolved with them on (but was more pronounced without them which I believe is normal). Recently, I have noticed her squinting when focusing with her glasses on, I am concerned about and wondering if this indicates a need for stronger glasses. She has a check up with the Orthoptist next week but wondering if anyone knows what I should expect ? Thanks