They achieved this through a "flat-prism lens" that is different from the triangular birdbath design in the One and older Xreal glasses. The new glasses are certainly more sleek than older Xreal ...
The Xreal One uses a triangular birdbath lens design that ... The Xreal One Pro is the first set of AR glasses with a flat-prism lens design that can create a 57-degree field-of-view.