You know, this is something I always ask an expert, how to do these extensive glass glares. I've never gotten a good answer. The other question, best way to go about braces removal. I've met retouchers who keep a library of teeth and eyeballs, and then just plop them into a picture if it looks sort of right. Either that, imperfect, or it's just cloning and painting, that's the best I've ever heard. I'd be interested in hearing how everybody else would approach something like this.
I've fixed glass glare on prints with dye or colored pencils. We'd just draw 'em in. In Photoshop, people tend to borrow eyes from someone else in the picture, or the lab I used to contract for would demand another picture of the person with the ext. gg so they could do a swap, and if none was available--refuse the job. It's just too easy for it to look wrong. I got a picture once someone else had tried... a man and his wife. She had big blue eyes and he had squinty little brown eyes. The retoucher just made a selection of the whole eyeball from the gal
and pasted them inside his frames, eyelashes makeup and all! The guy looked like Divine. At least they bothered to color them brown. If you're going to clone somebody's iris, at least make the contours of the person's eye their own (and eyes are never symetrical). I met a photographer, and he would put hairspray on people's glasses before the shoot. That's probably the best solution I've ever heard. But some photographers are afraid to ask that when their clients are rich.
Would fiddle with them more if this was for real, couple shadows are wrong, but figure you get the idea. I just drew these eyes in with the paintbrush on these lo-res heads. That's it, always sampling from the faces and painting them back. Start with the eyelashes and use the contours of their skin to figure where their eyes are. Then build them back. Did I get their eyes right? I just guessed. It's very important to work on a layer that's a copy of the background. That way you can flip between a before and after to see if you're actually following where their eyes should be. Also, after I'd stare at a picture like this a while, and I do, I flip the canvas horizontally. Regions of the brain get used to it and you lose perspective, helps you see it fresh. Also you may need to add noise at the end for the higher res version. Good luck with them, they are difficult ones.