This is a set of Eye materials for Dawn 2, which includes 20 new colors, with two extra variants for Firefly because they had a couple of nodes in the Superfly version that Firefly did not like-- and an optional outdoor cornea reflection, as well as a convenient mat to return the eye to it's default specular lighting.
Most of these are "normal" eye colors with only a few fantasy styles mixed in, it's intended as a starter set. While the mats themselves are not Merchant Resources, you are welcome to look at the node setups for your own creations and borrow those.
I noticed that sometimes in Poser if you move or change the lights, Poser "forgets" the eye highlights--you can then apply the outdoor reflection to kind of override that. (The other cure is to close and reopen Poser, which is not really useful when rendering.).