I would suggest that such questions are on-topic when they specifically relate to fulfillment of a Jewish obligation. We would, after all, accept questions like "How do you fulfill the mitzvah of hearing the shofar if you can't hear," or "Can you wear tape in your shoes Shabbos if you have a blister? If not, what can you do?" Questions like "how to prevent eye strain for Torah study" are simply other questions about how to get mitzvos done.
And, because they're based in Jewish life specifically, there will inevitably be some details that are different than the general application of these activities. For example, Torah study may be different from secular reading insofar as you may not be able to hold the book closer to your eyes; it is likely to be an old, printed book rather than a computer or Kindle; you can't deface the book; and you can't necessarily read it in the room with the best light. Torah study is a specific enough distinction to make the question reasonable for our site.
Also, if someone asked "How do you get bugs out of lettuce?," it would call for a different answer here than on the cooking site, because in Judaism we are much stricter about even tiny bugs than in general cooking. So I would call that a question that is appropriate for Mi Yodeya (even without "Jewishly" appended somehow to the question title).
I'd be a little more wary of questions that do not relate specifically to religious obligations, such as "How do you get kiddush wine out of a tablecloth?" Unless you knew of something significantly different about kosher wine stains that made them harder to remove than regular ones, and possibly even then, this question would be better off on Cleaning.SE or equivalent.
Also, I'd be wary of questions like "How to pack your lunch for work" (asked here because there may need to be more precautions taken to keep kosher food kosher than to pack regular food for a non-Jew). If that were to be here, I would suggest a more general phrasing like "How to transport food kosher-ly," so that we can get comprehensive Jewish answers rather than instruction lists for very circumscribed tasks.
But in general, I think a question is in scope here if it passes the tests, "Does it matter whether this is Jewish?" and "Would this get [roughly] the same answer on another SE site as here?"