I'm running at Gamma 1.8, which will make a difference if you are at 2.2, but even when I pull it into PS and boost the curves, I see that there isn't much detail there. I can see some as it is, but even if there were more, I think it would just add to the distraction.
I'm mainly going with paying attention to where my eye goes, not a formula or anything. I do notice that her close eye is right in the middle and she's facing out of frame, which might explain some of why I have a hard time keeping my eye on hers.
I think it's a great shot, so I'm not shooting it down. I'm just thinking of what would make it work a little better for me personally.