I've worn glasses for about 15 years for correction of my astigmatism and before, sunglasses, especially out in the landscape. With small cameras it can be a problem for cameras with short eyepiece relief. One of the things that saved me with my Nikons was a deeper relief, allowing me to see the entire finder.
The past few years, I've been shooting m43 cameras. On one system, I had a problem seeing the corners especially.
So maybe it's a matter of finding a camera with a deeper eye relief. Some of the cameras will give you this specification. It may be you need to try a different body to see what works for your glasses and your vision. It may be a more expensive body or even an older body that will work for you.
For me, my current m43, Oly D5 II, I don't seem to have an issue with the viewfinder, smashing it up to either eye via my glasses and shooting away. Neither an issue with any of my Nikon D cameras, from the D100 to D800 and in-between. I can't tell you about the 7x00 series since I haven't used one, but the others seem to work well with eyeglasses and the diaper correction works well.
If you opt for an eyepiece on your camera, Nikon used to have a fairly consistent 1-meter apparent distance to their screen though I don't know if that's the case today.