Eevee Glass Fading Problems

I want to use Eevee as my render engine, and so for my glass texture, I just turned up transmission on the principled shader and turned everything else all the way down. My only problem is that I have this fading effect on the glass around the edges and near the center, which I don’t want. Any ideas of what is causing this and what I should do to fix it?

Does it change or disappear with zoom out?
There are many things that are dependent on Screen Space in Eevee. When you see strange things on camera or viewport edges/borders, it is most likely due to it.
If this happens for the camera (final render), you must configure an extra overscan area:

I probably have not understood your question well. It would be better if you can share the .blend file.