Blythes have a long, interesting history.
This a neo-blythe by Takara, called Mademoiselle Rosebud. She has light customization done to her. Here she is in her original outfit.
If you read the above link fully you will know that blythes, not unlike Pullips, have an eye mechanism. They have a pullstring coming out of their heads which allows you to change the color and position of their eyes.