Eyes with red dot?

I'm a bit confused with how nobody has noticed Yukio's eye change.
For explanation, Yukio's eyes were a perfect pale blue when he was first in the series up until he first awakened in the fight against Todo. Now they have the red dot in the middle of them, just like rin in his devil form. Has nobody (in the canonical anime series) noticed this???

It feels like it should be obvious unless this is just a viewer thing, to symbolize the transformation he went through (like how haki in once piece isn't seeable, or how the visuals in the demon slayer breaths aren't real)

https://preview.redd.it/19l1m3j66i6e1.png?width=570&format=png&auto=webp&s=eaf0510ef63e59a14924916a476e284c7ed456e9

https://preview.redd.it/oudwwxr66i6e1.png?width=546&format=png&auto=webp&s=936b7b6392a0ee9d9b0cb68c42efe75abdfac843