I Think They Specifically Can Toggle The Glow At Will Kinda Like In The Movie Robots - Tumblr Posts
I got a wild extra expansion theory to pitch!
Irken eye color actually not being inherently down to genetics, at least past childhood. The Ruby hue may be a biological “default”, but as they grow and gain their hardware upgrades and develop out their individual personalities, some Irkens simply choose a different color setting for personal customization preferences. The default pinks are just the popular or most convenient choice for the majority of the population.


When we HAVE seen Irkens with more rare eye colors, their PAKs are matching along with it. It would be easy to brush that off and just say they’re actually changing the PAK to reflect the sclera, but the Zimvoid arc shows a pretty clear example of the former idea in action.
Comic spoilers, of course,



Infection and activation of the dib virus is indicated both with the color of the PAK and an Irken’s own eyes to that of a never before seen color variant, except in the initial infected PAK introduced on Zim#2!
i need to know your opinion NOW
also if you give me more opinions on your irken occular implants and pak headcanons in the tags i will kiss you