Ditto to much of what has been said.
Though I highly recommend that you go to your optometrist of opthamologist for a proper review of your eyes. Self diagnosis is all too risky when it comes to your eye, IMHO.
You're doing a lot of intense work there, and if you're like me, will be watching really close at what's happening. Too, your focal point on the applique is probably a different distance than when you read or do computer work. Also, you may be adding strain due to the lighting (too little and/or too much and/or too bright).
I have different eyeglasses for when I am working at the computer, than when at the machine.
Cheaters/Readers are not always as simple as buying them OTC. Sometimes you need prisms or other prescription work, which would be beyond the OTC ones. The only ones I will use are the ones from the optometrist. They are of a better quality than those from the drug store, etc. and for extended use, you want quality!
Please make yourself an appointment and ensure you are doing the right thing for your eyes .... after all, you want to continue to quilt for many many years!