Aren't pinhole eyes too far in the stages of development of the eye to appear all at once? Admittedly, the fact it has nostrils would provide the pits necessary for proper eyes to grow, but that's a lot of photoreceptors at once.

The inside is all one kind of surface, so given how much pressure there would be to improve it immediately, developmentally I don't see why not.

Saucebacks actually logically should not be able to exist in snowy environments because the snow absorbs sound and would make them blind. Any replacement sense in this environment would get selected to improve very, very fast.

I was going to argue that, based on the Sauceback physiology page, it would surely adapt to its sense of smell instead, but then I did some research and found out cold air delivers smells less efficiently. Between its echolocation being defeated by snow, its sense of smell blunted by cold air, and the Alpha timeline's lower scientific standards, it all seems feasible.

The little eyes make this pretty adorable.

The eyes aren't little, the dots are its pupils. It has no eyelids and the outside of the eye itself is feathered.