I used to have this item that I purchased from somewhere.  I can't even remember from which store.  It was an action for Photoshop that created the eyeball texture and the iris/pupil.  You could select how bloodshot you wanted the whites and would chose two colors for the cloud setting to make the irises.  I think there was also an option for the artificial reflection dot on the pupil.  I'm pretty sure these were V3/M3 eyes--possibly V2/M2.  I was looking for it on my PC to create eyes for Eva and it must have been a casualty of my hard drive reboot due to viruses and a Trojan horse a few years ago.  If anyone can remember the vendor, I might still be able to download it.  Otherwise, I will have to dig through over one hundred discs to try to find my old backup copy.  I know I could have posted this at the Adobe forum but I figured only Poser users would have purchased it since the eyes were for Poser characters.  Thank you in advance for your help. 

In case anyone cares, I found the action on my old PC.  It was called Millennium Eye Maker and I think it came from DAZ but is no longer available. 

IIRC, it's for V2/M2 and the eyes aren't great by today's standards. You'll get much better results with hi res photos and a set of templates.