qb74
I'm aware of ppi studies but there's a subtype of eye strain related to accommodative lead. All common eyestrain interventions run opposite to this population, e.g the need for high blue light to stimulate and 'wake up' an insensate accommodative process. high ppi is like reading glasses that run counter to a myope's needs
I don't bother with performance based studies and subjective symptoms cause poor context. look at the shitshow in orthopedics
you can supersample windows to 4k on a low pixel density screen to still get the 'high ppi' visual information for high contrast frequency with low spatial frequency. none of these studies do that