If I may propose a non-period correct aid to stitchers--look at your local crafts/hobby store for something called "Mag-Eyes". It's a headband-thingy that holds a lens out in front of you. It comes with a couple of lenses, at 2.0x and 1.6x, and you can buy others. Even works with bifocals!! Not too pricey, either--under $30.
On the sunlight front, there are a variety of small lamps with 'daylight correction'. Ott-light is the best-known and also most expensive.
Now, imagine, if you will, doing all this by kerosene and/or candlelight....
Stina