5-year-old child refractive error will self-healing

5-year-old children refractive error whether self-healing depends on the type and severity of the child's disease, if astigmatism, let the child eat more food containing carotene, and more look into the distance, there is the possibility of self-healing; but if amblyopia or strabismus, it is difficult to self-heal, need to be admitted to the hospital for optometry treatment.