ok, so in chapter one at the beginning there is a sign that says this:
A lot of Deltarune characters have their eyes obscured, specifically the boss of each chapter

Tenna doesn’t have visible eyes

King’s eyes are obscured

Same with queen’s
And the titan doesn’t have any eyes
Gerson has one eye closed

Even when he’s in his hammer of justice form

Spamton’s wearing glasses

Jevil’s got moreso eyeholes rather than actual eyes

In chapter 1 Susie’s eyes were hidden, we only saw her eyes from chapter 2 on

And Kris’s eyes are always obscured, except for sometimes when we don’t have control over them.
I’m not sure what to make of all this but it feels important somehow
Also I forgot to mention the knight doesn’t have visible eyes in most of their sprites either
Then you got Lancer and Mike…
I was considering the mikes but the problem with them is that they’re not the real Mike
True.
Also, while we’re still on the topic of Mike, Shadowguys and Zappers also have no eyes.
, which is really funny, even if they don’t count.
On the start, Ralsei’s entire body is obscured by a hood(very similar to the one that River Person uses)
Also where you got moving images?
I can only do:
Or
We yoink the GIFs from the main wiki.
Like copying them, then if we put them there they appear like this?
Let me try something cooler:
Now, don't TOUCH THAT DIAL, and don't STOP THOSE SMILES!! Because... 
I cant download images at all idk why
The rulers having no eyes could maybe have meaning but really this is all just a stretch that keeps going further
It says eyes blinded by darkness anyways not eyes that other people can’t see
Spamton isn’t blinded by darkness because he wears glasses
Also every single of them can apparently see, as none are completely blind
It’s likely a figure of speech or something, but I think this theory is likely (at least somewhat) true.