It took me good number of years of switching between glasses for reading/writing, glasses for the computer, and "distance" glasses. Finally, sometime in my mid-50s, I finally opted for "progressive" lens glasses. It took a couple of days to finally "adjust" to them, but the difference is like night and day! 1 pair does all!
In my early 40s, I tried a both bifocal and trifocal glasses, with lines at varying levels, and within 48 hours, discarded each pair. I then stayed with multiple glasses for 10 years, give or take. Of course, I never had the right pair with me when I wanted them somewhere "out of the ordinary" setting. Going progressive solved all my problems. The trick is the optician must be very good at picking the true center-point and curvature of your eye to determine exactly where the "progressions" are in the lens. I found out the hard way that not all opticians are as carefull and are more interested in making a sale than getting it right for the customer.
As for photography, I do a lot of shooting on autofocus. Having lenses with image stabilization also helps, too, as these days, I'm not as rock-steady as I used to be.
But there are many situations I encounter in photography at indoor gatherings (I've only done one wedding...my last!) where auto-focus will not select the person I want to focus on when there are multiple people in the picture at different distances from the camera. That's when there's no choice but to go to manual focus and hope I get it right. One thing I do in manual-focus situations where people are generally not moving...seated, for example...is to do "bracket focusing" as I call it...take 2 or 3 shots at progressively slightly less focus (turning ring counter-clockwise) and 2 or 3 shots at slightly more focus (clockwise) from where I first thought was 'in focus'.
Getting old has become a matter of losing everything...slowly --- hair...memory...hearing...vision...<I forget the rest>
And I'm a mere baby at 64! I can't -wait- to see how bad it is at 74!!! NOT!!!
Almost forgot to mention...I shoot with my glasses on at all times. Otherwise, I wouldn't be able to clearly see what I wanted to photograph in the first place!