The title does not represent the content of his answer. This is the line 'A dark close up display will induce dark adaptation while looking at it and light ada

The title does not represent the content of his answer. This is the line 'A dark close up display will induce dark adaptation while looking at it and light adaptation when looking elsewhere.' Meaning keep the light from the monitor consistent with your surroundings, to avoid having to readjust. Going a bit further into his point, the tests were done on a CRT not an LCD, where black is no light, not just a grey. LCD black is not really black so I don't think it 'induce(s) dark adaptation'. Even when we have OLEDS and low brightness text that would be dark enough trigger adaption monitors have an ambient lighting setting that would crank brightness to be clearly visible on a sunny day, adding light to the dark elements. Finally I use dark mode, when working in the dark, exactly the 'troglodytish existence' he advices against.