I use the envirosphere for all my renders. If I leave it white like the sceen you have rendered her eyes will reflect the white sphere and look wrong. What I do in this case is dispense with the "correct" reflections and use a cornea/eye surface texture that is transparent but has burnt in reflections on it. It's cheating but I only do it in that instance.

 

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740