Corky Scott wrote:

Ah, sorry, I did not describe the face shield properly: It's a full
plexiglass shield, not a face shield with a little window in it.

Yes, had it been the face shield with the window in it, I could have
replaced that window with the tinted glass from Tinman. But I would
have experienced the same problematic cutting off of the lower field
of view that I need for proper focusing.

Using the plexiglass face shield, you don't have to worry about
cutting off your field of vision, the entire shield is see through
tinted plastic.

Does that explain things better?

Yes, much. So theoretically you could cut a rectangular window in the
plexiglass shield (positioned appropriately for your vision issues) and insert
the tinted glass rectangle from Tinman. That way your primary field of vision
is properly protected, yet you still have some secondary field vision, too.

I have no idea if this is workable, however.

Russell Kent