Is there anything that can help with myopia control before my child needs glasses?

Yes! It is recommended that children spend (at least) 1 to 2 hours outdoors every day while the sun is out. Also, it is important to hold near work (books, tablets, etc.) at arms’ length, rather than with a 90° elbow bend. These approaches are tried and true, whereas the research on the methods mentioned above is still evolving.