it would have been surprising if IMHO the amount of blue light emitted from a screen is quite small compared to, well going outside even on a quite dark and cl

it would have been surprising if IMHO the amount of blue light emitted from a screen is quite small compared to, well going outside even on a quite dark and cloudy day The main source for eye strain (assuming a healthy eye) is not blinking enough due to focusing too much (a issue with is not new/existed pre-computer age). Most things which are commonly associated with being more straining also tend to make you focus more in ways which tend to make you blink less. Through even if IMHO the blue light in a monitor is unlikely to cause eye strain the exact light mixture it is in might very well affect you psychologically. Combine that with e.g. the placebo effect and using blue light filters might very well help you sleep better or be more relaxed at work and in turn have more micro pauses in which you blink. Something a "properly isolated study" might not capture.