I have rather severe presbyopia and astigmatism. I wouldn't think about trying to shoot without my no-line bifocals. I have found out that without glasses I can focus binoculars or spotting scopes such that the object I'm looking at is clear. I have found that can use traditional rifle scopes if I focus the eyepiece properly, but I have to wear my glasses.

Dot sights work, but the brightness has to be turned down. Smaller diameter dots work best. I've learned to use the dot by centering it in the black on a target and keeping even amounts of black around the dot. This works even if the dot is less than round.

If I could not recognize faces except at conversation range or read license plates, I'd run, not walk, to a qualified ophthalmologist. I put my glasses on first thing in the morning and take them off at bedtime. Your eyes need to become accustomed to glasses. Taking them off and putting them back on during the day stresses your eyes and the glasses don't seem to work.