I'm in my 60s, and was diagnosed with short sight at the age of 10 when I couldn't see the blackboard in the classroom at my new school (primary classroom was wide and shallow, secondary was the other way round). I also have astigmatism. I can read on all types of screens, but prefer an e-ink screen for long periods; I find the bigger the screen (up to a point), the easier it is to immerse. (I also have arthritis in my hands, and find repetitive swiping aggravates it.)
For lighting, I prefer a strong ambient light. I can read in direct sunlight, but prefer not to - I was told by my optician in my 20s not to go out in strong sun unless I wore a hat and/or sunglasses as I was complaining about day-time headaches. Apparently, it was the glare of strong sunlight that was triggering them.
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