>>395395792
You might be thinking about chromatic aberration which is a kind of distortion, and it is usually believed that aspheric lenses fix chromatic aberration. In fact, that is just the saying, as they do help, but they cannot solve the problem, as headsets like Varjo Aero and even the old Gear VR proved. You really need multiple low FOV heavy thick glass lens elements to perfectly eliminate the need for chromatic aberration correction.