With minimal work, I think you could get the perfect eye texture just by taking a good photo of an eye. Here I loaded a photo of my own eye into photoshop, did a little work to remove the reflection of the flash, and loaded it onto the new eye prop.

Note - we need to do something about the lacrimal.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)