>Chromatic aberration
Btw guys this isn't always correctable in software. The reason is because it depends on pupil position, which changes as the eye rotates. This is the same for geometric distortion as well. Because the distortion changes, often what they do is use an average distortion correction map. However, Aero does have eye tracking, and theoretically that could potentially solve this problem. Such a technique has yet to be proven out though.