I own both a Ruger American Rimfire Target Rifle (bolt action) and a Ruger 10/22 Deluxe Sporter. If you require vision correction in your daily life, and especially if you are either nearing or presently in that time of life (50s) when your eyes lose their natural ability to change focus, you will probably find that: (1) you have trouble seeing the front site post; (2) you will have trouble seeing a particular target at typical distances for .22 (say, 25-50 yds; worse if farther out); (3) trying to aim clearly with a rear peep site or rear slotted site will give you difficulty, as your eyes stuggle to see clearly both the front site and/or the target. This situation is neither enjoyable nor practical.
You may need to forego iron sites and move to telescopic sites (a scope). If you have problems with distance vision, you may find that you truly need magnification to see targets at distance. Using a red dot site might not help you if you have problems seeing targets at distance, because red dots are not magnified. Yes, you can mount a separate magnifier, but...too complicated!
For a scope on a .22 rifle, I would recommend low magnification--enough for you to see your target clearly, within typical .22 shooting distances up to about 100 yds. With low magnification, you will be able to see your target clearly, and also have a decent field of view (the amount of "real estate" that you can see through your scope, surrounding the object at which you are aiming). If you go to higher magnifications, your field of view will decrease, meaning your eye will require more time to "find" what you are looking for inside your scope (because you will be looking at a much smaller piece of real estate than at lower magnification). Stated another way, with lower magnification, you will be able more quickly to acquire (find) your target of interest while looking through your scope, versus using a higher-magnification scope.
Within typical rimfire distances, 3x to 9x magnification would be plenty (some might say, more than necessary) for target shooting and hunting, whereas a lower mangification, say, 2.5x to 4x, would be sufficient for typical .22 target shooting, "plinking" and and all but the smallest game. I have a 3x-9x scope on my Ruger rimfire target rifle and 2x-7x on my 10/22. With my aging, 58-year-old eyes, I feel I need the extra magnification on the high end, but, that's just me. Also, my rimfire shooting is target-oriented, rather than plinking or hunting.
I will note that I also own a Ruger Scout rifle in .308, with a 2.5x-4x scope, but this rifle is mainly for deer hunting (California), not for target shooting or plinking. Different scopes for different folks.