A randomized controlled trial in children found that undercorrection accelerated the progression of myopia. https://pubmed.ncbi.nlm.nih.gov/12445849/ https://pu

A randomized controlled trial in children found that undercorrection accelerated the progression of myopia. https://pubmed.ncbi.nlm.nih.gov/12445849/ https://pubmed.ncbi.nlm.nih.gov/12445849/. This trial had a similar but not statistically significant result: https://pubmed.ncbi.nlm.nih.gov/16907670/ https://pubmed.ncbi.nlm.nih.gov/16907670/ (There are conflicting observational studies, but these two were controlled trials).