Attached Link: Skin Resources

Unless you're going for a mechanical/robotic look, or outright fantasy, the best way to do eyes is to use photos.  Good luck with that because it's a huge pain in the backside to get realistic eyes without specularity or stray reflections in there.  

A good starting point for all your skin, hair and eye texture needs is 3d.sk.  Getting the photos from there is only half the story, though.  You can at least take a basic eye photo and clone parts of it to kill reflections and at worst, paint them out.

Whatever you do, please, please, please learn how to set up eye materials correctly.  If you really must put fake reflection maps in them, at least provide an option for those of us who like to use proper reflections.  Also, please remember, the cornea should never have a diffuse texture applied to it under any circumstances.  If I had a penny for every time I've had to edit them from other vendors I could probably have paid for half the content I've bought over the years. 

Coppula eam se non posit acceptera jocularum.

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