since making and maintaining eye-contact is such an important aspect of approaching, I wanted to ask the community how exactly to read a woman's eye play.

the reason I recently starting thinking about this was an interesting remark I read here (I believe it was seddit) which stated that men are conditioned to have women, that the guy is interested in, look at the guy. this conditioning comes from magazines and foto shoots where the models most of the time stare into the camera and give a sub-conscience feeling of eye contact.

now I can definitely read obvious signs of interest in a woman's eye, however have trouble, especially with shy girls, to read more subtle hints. and I know that girls generally don't maintain much.

so can somebody list the various ways women generally display interest (especially regarding shy girls since I am somewhat attracted to introversion) with eyes and looks?