I turn the backlight down as low as it can go and read in 30min-2hr chunks. I haven't tried a Kindle for any real length of time because of the page change slo

I turn the backlight down as low as it can go and read in 30min-2hr chunks. I haven't tried a Kindle for any real length of time because of the page change slowness (has that improved in recent models?) Anyway, i didnt find the eye strain to be bad, but I spend all day staring at a monitor so what is normal for me might not be normal for others.