Originally posted by RobG Thanks for all the feedback, folks! I didn't expect so much! I should have said that the specific situation that was difficult on the weekend was trying to photograph birds, because I needed to spot them without the camera, then try to frame them with the camera. It makes it really hard to take the glasses off. I'm getting a different prescription soon, because this pair isn't right, so I'll have to experiment further.
I've worn glasses for 50+ years, with the last 20 using progressives, for nearsightedness. I set the camera viewfinder to be in focus using my distance prescription. Then I get the same focus without (finding the bird or other subject) and with (taking the picture) the camera. This makes the locating the image/target and getting the photo much easier, as nothing goes blurry.
Looking at the LCD requires that I use the near prescription of my progressives. Without progressives, or bi/trifocals, you have to take the glasses off for checking out the LCD. Sorry, just a PITA for aging eyes. Make sure that you have a glasses strap when you rip your glasses off to do your chimping. No putting them in a pocket, or dangling them from your fingers. You will drop them.
Then step on them.
The glasses strap makes the operation swift and secure.
Wear a hat that shades the front of your face to reduce the extra light that can get into your viewfinder when you wear glasses. Otherwise, your exposures may be mysteriously off.