I can add my anecdotal experience as well. On Windows XP, the default refresh rate for CRT monitors was set low, to avoid burning out those that couldn't handle

I can add my anecdotal experience as well. On Windows XP, the default refresh rate for CRT monitors was set low, to avoid burning out those that couldn't handle more. It took me two years to figure this out. My screen was a fuzzy mess for those two years. Had progressing myopia during that period. Myopia stabilized after that. Edit: Found the support doc for this. Ah, 60hz default. https://support.microsoft.com/en-us/kb/311403 https://support.microsoft.com/en-us/kb/311403