We were talking about military toilet seats that have a heads up display, weren't we?!

With crappy middle aged vision, I can see the characters in the mask perfect. My problem is I need the right eye with a magnification diopter, and my left eye needs to see the heads up display of my rebreather with the left magnification diopter, both cemented in. This mask would interfere with the left eye's vision of my HUD, but Oceanic's plan was to integrate the masks' HUD with the rebreather controller, so no need for an external HUD.