I have used a wide variety of scopes over the past many years I've been shooting and with that said the scope you use needs to fit the application.
When I first started shooting fixed powers were the way to go, if you used a scope at all, and I've used fixed power scopes for most of my life. In fact all but two of my rifles wear Leupold M8 6X38s, and I've never had a problem in most hunting situations.
I, like you, have eyes that are suffering age, but have never found that I needed more that a 6x on shots less that 300 in standard hunting situations. If I need to check out a rack, etc. I use my 10x binos.
As I said before, two of my rifles do wear variable power scopes. I live in the west and occasional hunt where I know the possibility of a shot over 200 - 250 yards is a given, such as when I go antelope hunting in Arizona, or desert mulie in certain portions of California. One of those rifles, a .308 Win 70 F/W, carries a Kahles AH 3X9. It usually stays set @ 6x when I carry it, but if the shot is long I will crank it up for a more precise bullet placement.
The other rifle, a Browning 1885 Low Wall .243, wears a Nikon Monarch 3.3x10 AO, mil-dot scope. This is my special purpose rifle for long range. It's my antelope and occasional desert mulie rifle. It also does duty as a hunter silhouette rifle, even though I do get quite a few rings on the rams. The AO is not a hindrance in these applications as my shots are not snap shots and adjusting the AO after I range the target is second nature.
In your application, if all I hunted was wooded area with shots rarely, if ever, exceeding 200 yards I would opt for a good fixed 6x scope. If you must have a variable I would opt for at the most a 3x9, more preferably a 2x7. As to which scope, all the good scope makes have fixed power scopes. My personal preference is either a Leupold M8 6x38 or 6x42, or a Kales 6x42.
:money: