i use the ridiculous looking miner's headlights - got one at REI. i think Ella (rusty) uses a head light/magnifier combination and i heard someone say that a pharmacist would have something to magnify the syringe. you might ask your pharmacist for a suggestion. they are tiny!
one of my friends takes her reading glasses (not prescription, just drug store) and puts one pair on, then yes, puts another one on top of the first one. i thought it was the stupidest thing i'd ever seen. then i tried it for some fine stitching i was doing - and OHMYGOSH - you really can see a ton better with them. just another thought to try.