This is a tough one all right!
Thankfully he's looking pretty much directly at the camera, so it might be possible to fix one side, then copy it and use it for the other.
To that end, try these three layers: Download PSD
Then use the Handyman method to fix it further, to make it as perfect as possible in the circumstances.
Then Stamp Visible and use for the other side. You'll need to flip it, but of course keep a copy of the iris not flipped, otherwise the catchlights will be mirrored.