I am 83 and have Macular degeneration, the (worst) wet kind. Under the care of a retina specialist, I am still able to thread my sewing machine needles (5 different machines; four w/auto threaders that don't consistently work). I have used the following needle threaders for decades and am still able to thread my own machines with the following device. In fact, when I teach, I include one of these in my gift to fellow sewists who later tell me it was the most useful notion in their sewing room. As for myself, I keep at least four in reserve as eventually, I'll manage to get the small wire caught on something and pull it out from the handle. SUMMARILY: I WOULDN'T BE WITHOUT IT.
Here are a few sources with current pricing for the PERFECT SEW UNIVERSAL NEEDLE THREADER AND NEEDLE INSERTER:
Etsy at $7.64 (Threader wire is shown on the lefrt, but it inserts into the needle while holding in your left hand so thread hook is down where the thread hooks under it and pulls back through the needle.)
https://www.etsy.com/listing/1138554...17e84dde6dcab5
$6.95 at Sewing Machines Plus
https://www.sewingmachinesplus.com/7...e17c754cb97a79
$6.99 at Sewing Parts Online
https://www.sewingpartsonline.com/ne...77341f&index=1
Yours to fall in love with. Hope this helps. ~Jo