Look at your clear lexan headlight cover. What is that little circle (bullseye) right there, in front of the low beam? My car has it, my wife's Santa Fe has it, as well as most other cars I looked at. Is there a reason it's right in the middle of the headlight beam "circle". Mmm, doesn't take much to amuse me!

LVP

 

Two possibilities that I can think of...

1) Intentional scattering of light. If the optical system were "perfect", then there would be no illumination above the cutoff, or much to the sides. You want some small amount of illumination outside of the beam proper. Old headlamps (like 1975) were such optical garbage that there was always some scatter.

2) Some kind of target for automated headlamp aiming system in the factory. A nearly-finished car on the assembly line isn't positioned so precisely that an optical aiming system can "find" the headlamps by itself without some help in the form of a unique target.