According to a pending patent filed by Apple and spotted by PhoneArena, called “Display System With Localized Optical Adjustments”, Apple is looking at a lens that can allow the wearer to adjust the brightness of how one sees the real world to allow overlayed digital content to be better and faster understood.

In the patent, Apple states:  “An adjustable lens system may be adjusted dynamically to accommodate different users and/or different operating situations. Adjustable light modulators may be used to selectively darken parts of a user’s field of view. In particular, a spatially addressable adjustable light modulator may be used to generate a dark region that overlaps a bright real-world object that is overlapped by computer-generated content in the upper right corner of a user’s field of view,”