I had to look that up, but yes that looks correct. Except that, from the diagram, it bends your view by less than a right angle. Opposite vertical direction though.
me too! I've recommended them to so many people at this point (including another commenter upthread). kindle landscape mode is great for prism glasses, just at the upper bound of what their vertical FOV can hold.
I use them for reading in bed, although sites do everything in their power to make landscape mode on mobile phones unusable.