I looked at the render (I am talking about the lower one) and although you may slap my hand for it - it shows exactly what I mean. The iris of the left eye almost "touches" the lacrimal while there is a part of the sclera visible in the left outer corner of the eye. As said: This happens to many people - but looks like a strabismus.

Maybe it's just my personal taste, but I think that when looking aside the eyes should look like this
http://root.kevinmillsphoto.com/images/Eyes/original_eyes.jpg

and not like this (and this photo was manipulated, but the photographer took only care of the color...)
http://www.designnation.de/Media/_Generate/Galerie/l.48d8ba494f633,ice-eyes.jpg

About the subtended angle: Am I right that you ask about the space required by the iris in proprtion to the complete eyeball's surface?

I'm not always right, but my mistakes are more interesting!

And I am not strange, I am Limited Edition!

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