The blue nevus and Mongolian spots are examples of this light dispersion effect.

蓝痣和蒙古斑就是这种光散射效应的例子。

youdao

Mongolian spots usually fade to a large extent, if not completely, within the first decade of life (often within the first few years).

CNN: What are Mongolian spots?

In contrast, fewer than 10% of Caucasian infants have Mongolian spots.

CNN: What are Mongolian spots?

For families looking for a nongeographic name for these birthmarks, I have suggested using the term "ink blots, " but Mongolian spots are a commonly used term in the health care field.

CNN: What are Mongolian spots?