I love needlework and intricate lace knitting, but I've had this problem for the past year or so. I could see my yarn and those itty-bitty stitches just fine, but when I looked back up at the rest of the room, it took a few minutes for everything else to come back into focus. I solved the problem by not looking up until I absolutely had to. I'd still be avoiding the issue, but the anti-reflective coating on my glasses was peeling off and there's a point where you just can't look through scratches anymore.
It turned out that my prescription for distance had changed just a bit. I didn't need bifocals, just a slightly different prescription. I put off new glasses for another four months, mostly because I couldn't find a pair I liked. Now I have a brand new pair that I don't really like -- but I do love being able to see my stitching and the rest of the world! I'd been going in for regular exams. This was a combination of a change in vision that hadn't changed my prescription and a later change in vision piled on top of that.
Weekly Stash Report
Fabric Used this Week: 0 yards
Fabric Used year to Date: 11 3/4 yards
Added this Week: 0 yards
Added Year to Date: 45 yards
Net Added for 2014: 33 1/4 yards
Yarn Used this Week: 0 yards
Yarn Used year to Date: 3375 yards
Yarn Added this Week: 0 yards
Yarn Added Year to Date: 1500 yards
Net Used for 2014: 1875 yards