That is actually a device that Osamu Tezuka stole from Disney when he made Astro Boy in the 50s. Japanese animators liked the results and adapted it into their work, leading to the creation of anime eyes.Wuggy said:Yes, it's the art style.
Asian people are usually recognized by their eyes being being "leaner", resulting from their eyelids being kind of lower. However, the Japanese culture considers small eyes (particularly on anime) to look "mean" or "rude". The artstyle reflects on that: you'll notice that most often young and/or the main characters (the good guys) have large eyes, whereas usually the antagonists and/or people with dismissive/mean/cool personality have leaner eyes.
Also, saying all anime character are "all" white, simply isn't true. I don't watch anime or read manga myself, and I know this.
They might seem difference, but compare these two images.
Compare the faces, and see how many things Astro Boy (1952) has taken from Pinocchio (1940).
-Large, innocent eyes
-Button nose
-Small mouth
-Similar Ear Structure
-Same facial structure
-Body Shape
I know this doesn't answer the question of white people, but I thought you should know that many of the tropes related to anime have their roots in disney, particularly the eyes.