For those interested, there are a couple of treatments available in the U.S. to slow the progression of childhood myopia. MiSight[0] contacts and low-dose atropine[1].
I would highly recommend an inexpensive under-sink water filter, hooked up to the cold water line. I have a 3M "Aqua-Pure" which is far more convenient than the pitcher style, and probably filters better. I use it for everything; drinking water and cooking are the obvious options, but it also improved the flavor of my homebrew beer.
[0] https://www.fda.gov/news-events/press-announcements/fda-appr... [1] https://www.aao.org/eyenet/article/how-to-use-low-dose-atrop...