thanks you two!
i found what i was looking for
www.clearlycontacts.ca-/special-effects-lenses/ you can try them on a model, it really helps.
i want one "rock star", ice blue w/a big black star in the middle. the other eye can be plain sapphire blue.
the creepiest are the ones that cover the whole eye, esp. skeletal teeth. so many to choose from & one can look even weirder than two. and i like to mix them up, too.