There's a husband and wife team of optical scientists who have been studying myopia and theorize that high contrast across the retina signals the eye to elongate which leads to myopia. "Their big breakthrough in understanding myopia occurred in 2008 when they studied a particular group of people who had a genetic form of myopia that’s very severe. They discovered a gene mutation that was causing the myopia." As a result, they patented glasses that blur your peripheral vision, and a trial has shown them to be more than 50% effective at reducing myopia.
These are now commercially available and my kids wear them. It's a basically invisible pattern of dots, not a visible blur, and both have stopped the progression of their myopia in their tracks.
https://newsroom.uw.edu/news-releases/glasses-stop-myopia-ar...
https://bjo.bmj.com/content/bjophthalmol/107/11/1709.full.pd...
https://patents.google.com/patent/US11493781B2/