Advice please regarding eye-strain.

[spacediver]

one observation which seemingly contradicts these:
in the dark, when you move a bright object together with a darker object, the darker object appears to lag behind. i noticed this for like a phone screen vs. the charger's plug

does it seem as if the object lagging behind is doing so because its image has higher persistence (and therefore has a longer trail), or because it is processed in the visual system with a higher latency?