I could "read" it at that level, but it would give me a headache pretty quickly, squinting and turning my head and whatnot to follow the lines.
It's easy and comfortable at 5 levels up, less so at 4, etc.
No reason to strain oneself if there's no need (isn't that half of why we're putting motors on our bikes?
), so I do what's comfortable.
Unfortunately there's quite a lot of things that don't correctly support doing this, so I end up hacking things visually as much as I can.
I have bifocals for things like reading small print, but they're really only good for about 12-16" away, and only for the tiny area the bifocal part exists in. The other part lets me see normally farther away (like for riding). Outside of the 12-16", it's easier to see without them, by just making print bigger, etc.
I used to be so nearsighted that I could read the tiny decals that came with Tamiya military models, which just look like dots or streaks to most people, but actually are faithful replicas of the labels on things, just in millimeter-scale.
But nowadays I'd need a microscope to see those things (I'm almost 50
just after the next fire anniversary).
I also have always had trouble with certain color combinations, like red text / white background and to a lesser extend white text on red background--those blur together unless I hold my head sideways, which makes it a little better. It's worse with skinny vertical letters, vs wide horizontal ones (and that part is also true of most other text on any color combinations). Black text on an amber background is the easiest to read, but the bright color gives me a headache after a while. (used to be that amber on a black background (like dumb terminals) worked really well, but it gets blurry nowadays unless the letters are really thick or huge). Lightly shaded ambers (like dimmer incandescent-lit paper) are not quite as easy to read but they don't give me a headache. The next best is the light blue backgrounds with black text. Just black and white is another headache waiting to happen.
(also, the frames of my glasses are disintegrating (my sweat/skin destroys things plastic or metal or cloth), and they're the last set of frames I have that fit these lenses; I don't know anywhere that will let me buy just the frames, they require that I pay to get a new prescription and pay to get new lenses, and I definitely cant' afford that--I couldn't even get two sets of glasses, one for reading / computers and one for walking/riding around, back after the fire when I got the ones I have now. So I also don't wear them unless I have to right at that moment. I have one set of Bill's old glasses that are close enough to my far-seeing prescription to wear for short rides, so I use them for my work commute, since the lenses sometiems fall out of mine, and I don't want to lose them on the road. But I start to get a headache wearing them for much longer than that).