That last link is the clincher!

The iris is slightly concave BUT is set back due the Anterior Chamber Angle by several millimeters from where you might think it is!  The refraction of the cornea causes it to look different from what it is by a slight amout, giving a slight error in knowing what the actual shape IS.

If the first eye in Les' post had a bigger iris set back behind the schlera  with a cornea with glass or water refraction, it would look like a real eye, I do believe.

Having suffered blindness in the 90's, the structure of the eye is one of my passions.

([  Is what we have in Les's morphed eye, but what we NEED is something more like a  ( ] ,if you get my drift., with the ] part being bigger to prevent loss of texture at the edges and no gaps in the mesh.

(=cornea, and [ or ] =the iris

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!