On V4, the eyes are anatomically inaccurate by default. The cornea/eye surface bulge is missing. And once you bulge the cornea, since we're using transparency and not refraction, you need to bulge the iris, too to make it sort-of appear to be refracting.

I actually increased the maximum value on the morphs and used 2. 

Here they are set to 1.

The morphs are:

EyeCorneaBulge

EyeIrisConvexity

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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)