I’m not at all sure that this piece of advise/insight is in any way going to be helpful to you and/or if you are already aware of the things I’m going to say. But just in case I like to put this out here.
I’ve noticed that this isn’t the first time you mention your bad eyes (not talking about your retina surgery) and problems arising from just that. Coming home and finding out that many shots aren’t focused correctly is surely a downer. This got me thinking and wondering…
Would it be an option for you to upgrade to a new body?
If I’m not mistaken you shoot with a Nikon D3300, which is a nice camera but, from a technologically point of view, somewhat dated. In general this isn’t that much of a problem, I shoot with a D750 which is from the same era, but things have progressed nicely in the last 10 or so years.
- Focus related technology; Auto focus, focus peaking, low-light performance etc have come a long way.
- Viewfinder technology; The current electronic viewfinders are rather nice and crisp and are definitely more helpful then the “old fashioned” version.
- Live view (or equivalent); You are, like me, from a viewfinder only generation and I know that it took me a while to see the benefits from using the monitor on the back instead of the viewfinder. Still a bit of a hassle with the older models (like my D750 or your D3300). The newer generation camera’s makes using this a lot easier (touchscreen) and the info shown/given is also more to the point/clear. The larger size, compared to the viewfinder, should also be welcome if one has eye problems.
Those three points would make your shooting experience a lot more pleasant, and that is just looking at it from your eyes point of view.
If you are in any way looking for a camera that incorporates the above and is also able to use the current DX lenses you have at the moment maybe have a look at the Nikon Z 50 or, if you want to go full frame, the Nikon Z 5.