I'm 55.5 and got bit more than 7 years till retirement. For the past five years I've been using a right contact lense that makes my front sight in focus and the left eye is set for distance.
The sight picture looks just like it was in my 20s thru mod 40s. I must still use readers for close copy.
My brain seamlessly integrates what I'm seeing. A co-worker and my wife simply cannot make that set up work for their eyes and brains.
I've also had glasses set up with normal bifocal at bottom of lenses and the "perfect front sight" formula at the top of the right lense so I can use good stance and not do the Danny Glover head position.
I can see every