I almost bought one of those Singer needle threaders but missed out on it. Maybe SteveH outbid me? Ha! Anyway, I finally bought one of these (not from Amazon as it looks like you can find them in lots of places now) and once I figured out how to work it properly, it worked out well. Yeah, my vision is going to pot due to age so I am going to need all the help I can get threading any needle. Good luck with your hunt/purchase.
https://www.amazon.com/Dritz-Machine...eedle+Threader
PS: If you are buying one of the Singer threaders on auction, make sure it has all it's parts. Sometime they are missing the threader part or the ripper part.