I am newly long sighted so even with glasses threading my machine needles was something I was dreaded and then I had a lightbulb moment.
I remembered something I was told in a class I took several years ago that most sewing machine needles have a groove leading to the eye. If you cut your thread on the diagonal so you have a point and no little filaments fraying out of it, you can stroke the thread down the front of the needle and it will 'pop' into the eye.
This works 9 out of 10 times for me. The failure is due to the fact I would have not cut my threat on a 45 degree angle!