I agree white eyeballs are not very realistic.
But sometimes this can give a figure a very dramatic accent.
I found this one from many years ago.
Also pronounced eye white can create comic interaction between different figures.
Its a matter of taste but when painting dwarve-like figures like the old Strelets or New Line Design such puppet eyes can be part of the style.
It is obvious I used too thick paint.
Here are the guys with the fluffy eyes.