what is the type of squint
she has.eyes move inward or outward?can u give the full glass prescription pls.do they apply dilating drops n check.
refractive error(power) is mainly due to the length of the eyeball and shape of the cornea
which keeps changing as the child grows.cylindrical power doesnt vary majorly as the spherical power does as the child grows.give her a healthy diet it may help in betterment of eye growth.
waiting for further details from u