Some cameras, even the newfangled autofocus models can be fitted with a
threaded eyepiece for diopter correction lenses. I would think with the
aging population, that cameras would come with this feature built in.
Sometimes those autofocus computers make goofy choices.

<I try to keep the "equally critical" under control, it is the eye that
misbehaves. Lately I have to depend on the autofocus on the camera as I
cannot see through the viewfinder in focus.