The best I can do for you - is just tell you scientific truth. When the plus is worn intelligently - for five years - the child is successful. Here is a short video to review that topic.https://www.youtube.com/watch?v=-6XqqfMt7po
I just wish I had been told this - when I was a 20/40, and -1 diopter. I would most certainly have begin wearing the plus - full time.
The consequences if you turn this down - are very serious. Yet on OD will "volunteer" this information to you. I think that is a crime.
For those of you who are now wearing a plus - with the wisdom required - I hope you continue.