One color. Simple and recognizable shape. Proportionally still the size and location of pupils compared to the rest of the eye. Enhances the emotions the face and body is expressing to make the emotional context more clear.
How not to make good eye effects:
Too many colors, or too many details. Improper size (too big) and location make the effect not look like pupils anymore. Doesn’t add anything to the emotion the body and face is making, and instead is used as a substitute for facial and body expression.
You put a face in her eyes. YOU ADDED MORE FACES TO HER FACE
AngelMihe 